1970-78 camaro - speedway motors

1970-78 Camarowith Factory Air

565073

905077 REV B 7/23/14, 1970-78 CAMARO WITH A/C EVAP KIT PG 1 OF 28

an ISO 9001:2008 Registered Company

18865 Goll St. San Antonio, TX 78266 ph: 210-654-7171 fax: 210-654-3113


Table of Contents 3. Packing List/Parts Disclaimer 4. Information Page 5. Wiring Notice 6. Engine Compartment, Condenser Assembly, Compressor Brackets and Pulleys Figures 1, 2, 3, 4 & 4a 7. Passenger Compartment Figures 5 & 6 8. Passenger Side Kick Panel and Fresh Air Cover Modification Figures 7 & 7a 9. Defrost Duct Installation & Hose Adapter Installation Figures 8 & 910. Fresh Air Cover and Heater Cover Assembly Installation & Kick Panel Fresh Air Cap Installation Figures 10, 11, 11a & 11b 11. Firewall Cover Installation & Evaporator Bracket and A/C & Heater Hose Installation Figures 12 & 1312. Evaporator Bracket and Heater Fittings Installation (Cont.) Figure 1413. Evaporator Installation Figures 15 & 15a14. Center Louver Installation Figures 16, 16a & 16b15. Drain Hose Installation, Under Dash Louver Duct Hose Adapter Installation Figures 17, 18 & 18a16. Lubricating O-rings, Standard Hose Kit & Modified A/C Hose Kit Figure 19 17. 1970-73 Camaro Heater Hose & Heater Control Valve Installation Figure 2018. 1974-78 Camaro Heater Hose & Heater Control Valve Installation Figure 2119. Final Steps, Glove Box Installation and Under Dash Louver Installation Figures 22, 22a, 22b & 23 20. Control Panel & Duct Hose Routing Figure 2421. Wiring Diagram22. Gen IV Wiring Connection Instructions23. Operation of Controls24. Troubleshooting Information25. Troubleshooting Information (Cont.)26. Kick Panel Modification Template27. Glove Box Light Template28. Evaporator Kit Packing List


** Before beginning installation, open all packages and check contents of shipment. Please report any shortages directly to Vintage Air within 15 days. After 15 days, Vintage Air will not be responsible for missing or damaged items.

1.2.

11

762171781177

1

Accessory Kit781177

6-Vent Evap orator Sub Case w/ 204 ECUAccessory Kit 1970-78 Camaro with A/C

No. Qty. Part No. Description

Packing ListEvaporator Kit (565073)

2

OFF

DASH

HOT

FLR

HI

DEF

COLD

A C

6-Vent Evaporator Sub Case w/ 204 ECU

762171

NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.


Use of Any Other Refrigerants Will Void All Warranties of the Air Conditioning System and Components. Use of the Proper Type and

Amount of Refrigerant Is Critical to Proper System Operation. VintageAir Recommends Our Systems Be Charged By Weight With a Quality

Charging Station or Scale.

Service Info:

Safety Switches:

Important Notice—Please Read

Attention: The following system components are capped: Compressor, evaporator, condenser & drier. Caps may be under pressure with dry nitrogen. Be careful removing caps. Do not remove caps prior to installation. Removing caps prior to installation will cause components to collect moisture and lead to premature failure and reduced performance.

Evacuate the system for 35-45 minutes with system components (Drier, compressor, evaporator and condenser) at a temperature of at least 85° F. On a cool day, the components can be heated with a heat gun OR by running the engine with the heater on before evacuating. Leak check and charge to specifications.

For Maximum System Performance, Vintage Air Recommends the Following:

Heater hose may be purchased from Vintage Air (Part# 31800-VUD) or your local parts retailer. Routing and required length will vary based on installer preference.

Vintage Air Systems Are Designed to Operate With R134a Refrigerant Only! Use of Any Other Refrigerants Is a Fire Hazard and Could Damage Either Your Air Conditioning System or Your Vehicle.

Refrigerant Capacity for Vintage Air Systems:(For other systems, consult manufacturer’s guidelines)

R134a SystemCharge with 1.8 lbs. (1 lb., 12 oz.) of refrigerant.

Lubricant Capacities:New Vintage Air-supplied Sanden Compressor: No additional oil needed (Compressor is shipped with proper oil charge).All Other Compressors: Consult manufacturer (Some compressors are shipped dry and will need oil added).

Your Vintage Air system is equipped with a binary pressure safety switch. A binary switch disengages the compressor clutch in cases of extreme low pressure conditions (Refrigerant Loss) or excessively high head pressure (406 PSI) to prevent compressor damage or hose rupture. A trinary switch combines Hi/Lo pressure protection with an electric fan operation signal at 254 PSI, and should be substituted for use with electric fans. Compressor safety switches are extremely important since an A/C system relies on refrigerant to circulate lubricant.

Heater Hose (Not Included With This Kit):

To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the cowl and/or firewall, Vintage Air recommends coating the threads with silicone prior to installation.

Bolts Passing Through Cowl and/or Firewall:


Important Wiring Notice—Please Read

Some Vehicles May Have Had Some or All of Their Radio Interference Capacitors Removed. There Should Be a Capacitor Found At Each of the Following Locations:

1. On the positive terminal of the ignition coil.2. If there is a generator, on the armature terminal of the generator.3. If there is a generator, on the battery terminal of the voltage regulator.

Most alternators have a capacitor installed internally to eliminate what is called “whining” as the engine is revved. If whining is heard in the radio, or just to be extra cautious, a radio interference capacitor can be added to the battery terminal of the alternator.

It is also important that the battery lead is in good shape and that the ground leads are not compromised. There should be a heavy ground from the battery to the engine block, and additional grounds to the body and chassis.

If these precautions are not observed, it is possible for voltage spikes to be present on the battery leads. These spikes come from ignition systems, charging systems, and from switching some of the vehicle’s other systems on and off. Modern computer-operated equipment can be sensitive to voltage spikes on the power leads, which can cause unexpected resets, strange behavior, and/or permanent damage.

Vintage Air strives to harden our products against these types of electrical noise, but there is a point where a vehicle’s electrical system can be degraded so much that nothing can help.

Radio interference capacitors should be available at most auto and truck parts suppliers. They typically are cylindrical in shape, a little over an inch long, a little over a half inch in diameter, and they have a single lead coming from one end of the cylinder with a terminal on the end of the wire, as well as a mounting clip which is screwed into a good ground on the vehicle. The specific value of the capacitance is not too significant in comparison to ignition capacitors that are matched with the coil to reduce pitting of the points.

Care must be taken, when installing the compressor lead, not to short it to ground. The compressor lead must not be connected to a condenser fan or to any other auxiliary device. Shorting to ground or connecting to a condenser fan or any other auxiliary device may damage wiring, the compressor relay, and/or cause a malfunction.

When installing ground leads on Gen IV systems, the blower control ground and ECU ground must be connected directly to the negative battery post.

For proper system operation, the heater control valve must be connected to the ECU.

•

•

•


Engine Compartment

FIGURE 1

1. Battery and battery tray (retain) (See Figures 1 and 3, below).2. Drain radiator.3. Evacuate the A/C system if necessary.4. Condenser, lines and the (4) OEM rubber well nuts in core support (discard) (See Figure 1, below).5. OEM compressor and bracket (discard) (See Figure 2, below).6. Evaporator and blower assembly (discard). To remove the evaporator and blower assembly (under hood) and the air distribution system (under dash), the factory manual indicates doing the following: Remove right lower rocker molding. Remove lower fender attaching bolts. Remove skirt to fender and skirt to reinforcement screws. Pull out on lower portion of fender, moving the skirt away from the fender flange and firewall. Block the skirt with a 2” x 4” block of wood. To avoid damage to paint and sheet metal, and for ease of removal and replacement of components, Vintage Air suggests that the right fender be removed and inner panel be lowered (See Figure 3, below). Remove OEM heater hoses, A/C hoses, hardlines and drier (discard) (See Figure 4, below).7. Remove OEM A/C & heater wiring/vacuum harness molded grommet (See Figure 4, below).8. Install 1 ½” plug in firewall (See Figure 4a, below).

Battery

Condenserand Lines

(4) OEM RubberWell Nuts

Typical Condenser Shown

Typical V8 Shown

Typical Hoses& Lines Shown

OEM Compressor and Bracket

PassengerFender

BatteryTray

InnerFenderPanel

DrierAssembly

A/C HosesHeaterHoses Blower &

EvaporatorAssembly

Figure 1

Figure 3 Figure 4

Figure 2

Remove The Following:

OEM A/C& Heater

Wiring/VacuumHarness

Molded Grommet

33173-VUI1 ½” Plug

Figure 4a

1.

1.

Refer to separate instructions included with the bracket kit to install the compressor bracket.

In most instances, the belt lengths will remain the same.

Compressor & Brackets

Pulleys

1.2.

Condenser Assembly & InstallationRefer to separate instructions included with the condenser kit to install the condenser.Binary switch installation (Refer to condenser instructions).

NOTE: Before starting the installation, check the function of the vehicle (horn, lights, etc.) for proper operation, and study the instructions, illustrations, & diagrams.


NOTE: Removal of dashboard is required to install the evaporator. Vintage Air recommends that you utilize the factory service manual when you disassemble and reassemble the dashboard.

Glove Box

InstrumentPanel

ControlPanel

Driver SideLouver Kick Panel

Kick PanelFresh Air Cover

Glove BoxDoor

A/C and Heater Assembly& Related Ducting

Figure 5

Figure 6

1. Glove box door (See Figure 6, below).

2. Glove box (discard, retain screws) (See Figure 5, below).

3. A/C, heater/evaporator assembly and all related ducting (discard), retain screws (See Figure 6, below).

4. A/C heat outlets (retain). Instrument panel must be removed to get to left outlet and control panel (See Figure 6, below).

5. Control panel assembly (retain control panel) (See Figure 6, below). Refer to control panel conversion kit instructions for installation of controls.

6. Remove passenger side kick panel fresh air cover (discard) and kick panel (retain). Remove cable (discard) from panel (See Figure 6, below).

7. Remove OEM defrost duct assembly.

Passenger Compartment

Remove the Following:


Passenger Side Kick Paneland Fresh Air Cover Modification

Figure 7

Figure 7a

1. Remove kick panel by removing the (4) OEM screws (See Figure 7, below).

2. Place template on kick panel as shown in Figure 7, below.

3. Cut fresh air door ASM using the template provided on Page 26 (See Figure 7a, below).

4. Cut and trim passenger side kick panel fresh air cover as shown in Figure 7a, below. NOTE: Fit and trim if needed.

Fresh AirDoor Assembly

Template

Fresh AirDoor Assembly

(4) OEM Screws

Cut Out This

Section

Template

CUTOUT

PassengerSide

Kick PanelFresh Air Cover

1 ⅝”

3 ½”


Driver SideDefrostDuct

627171-PCA 10/24 Nutw/ Star Washer

10/24 X 3/8”Pan Head

Screw

OEMDefrost Duct

Mounting Flange

Passenger SideDefrost Duct627171-PCA

Defrost Duct Installation1. Install the defrost ducts under dash on OEM defrost duct mounting flange as shown in Figure 8, below. Secure using 10/24 x 3/8” pan head screw and 10/24 nut w/ star washer.

Figure 8

Adapter49881-VCI

Adapter49881-VCI

Install(3) S-clips

Install(3) S-clips

Passenger Side

Driver Side

Hose Adapter Installation1. Install S-clips on hose adapters as shown in Figure 9, below.

2. Install driver & passenger side hose adapters on OEM louvers. See Figure 9, below.

Figure 9


1/4-20 X 1 1/2”Bolt w/ Washer

Fresh Air Cover andHeater Cover Assembly Installation

Silicone

Fresh AirCap

OEM Holes

(4) Grommets33137-VUI

Back Sideof Fresh Air

Cap

EngineCompartment

Firewall

1. Using heater firewall cover assembly as a template, mark and drill (2) 5/16” holes (See Figure 10, below). NOTE: Make sure to center heater firewall cover assembly hole with OEM hole on firewall before drilling.2. Enlarge (2) OEM holes in firewall to 5/16” (See Figure 10, below).3. Install (4) grommets in fresh air cap (See Figure 10, below).4. Apply a 1/4” bead of silicone around the back side of the fresh air cap as shown in Figure 10, below. Attach fresh air cap to firewall using a 1/4-20 x 1 ½" bolt and washer (See Figure 10, below). NOTE: Fresh air cap installs on engine side of firewall.5. Install plugs in firewall (See Figure 10, below).

Kick Panel Fresh Air Cap Installation1. Install (4) grommets in kick panel fresh air cap (See Figure 11a, right).2. Route A/C and heater hose through fresh air cap and kick panel fresh air cap as shown in Figures 11 and 11b, below.3. Apply a 1/4” bead of silicone around the back side of the kick panel fresh air cap as shown in Figure 11a, right.4. Secure kick panel fresh air cap using OEM screws as shown in Figure 11b, below.

(5) OEMScrews

Silicone

#10 A/CHose

#6 A/CHose(2) Heater

Hoses

#10 A/C Hose

#6 A/C Hose(2) Heater

Hose

(4) Grommets33137-VUI

Figure 10

Figure 11bFigure 11

Figure 11a

(2) Drill 5/16” Hole

OEMHole

Heater FirewallCover Assembly

644021

7/8” Plug317100

1”Plug

317099

Enlarge Hole To 5/16”

1 5/8” Plug

317101Enlarge Hole To 5/16”

Back Side of Kick Panel

Fresh Air Cap


Evaporator Bracket and A/C& Heater Hose Installation

1. On a workbench, install evaporator rear bracket and A/C & heater hose with properly lubricated O-rings (See Figure 14, Page 12, and Figure 15a, Page 13).

2. Install front mounting bracket on evaporator using (2) 1/4-20 x 1/2” hex bolts, and tighten as shown in Figure 13, below.

Firewall Cover Installation 1. Enlarge (2) OEM firewall holes to 5/16” (See Figure 12, below).

2. Apply a 1/4” bead of silicone around the back side of the firewall cover (See Figure 12, below).

3. From inside the car, install the firewall cover onto the firewall (See Figure 12, below). From the engine compartment, secure the firewall cover to the firewall using (3) 1/4-20 x 1” hex bolts with washers (See Figure 12, below).

4. Apply a 1/4” bead of silicone around the back side of the heater firewall cover bracket as shown in Figure 12, below.

5. From inside the car, install heater firewall cover assembly onto firewall (See Figure 12, below). From the engine compartment, secure heater firewall cover assembly to firewall using (2) 1/4-20 x 1/2” hex bolts with washers (See Figure 12, below).

EngineCompartment

Side ofFirewall

(3) 1/4-20 X 1”Hex Bolts

w/ Washers Enlarge OEM Holes to 5/16”

Back Sideof Firewall

Cover

Silicone

View Shown FromInside Car, Through

Dash

Figure 12

Figure 13

(2)1/4-20 X 1/2”Hex Bolt

Back Side of Heater FirewallCover Assembly

Heater FirewallCover Assembly

644021Silicone

(2) 1/4-20 X 1/2”Hex Bolts

w/ Washers

FirewallCover 648228


Rear EvaporatorBracket Assembly

644023

Evaporator Bracket and Heater Fittings Installation (Cont.)

Figure 14

1/4-20 X 1/2” Bolt(Located on Sub Case)

Without A/C

WithA/C

(2) HeaterFittings121004


Kick PanelFresh Air

Cap

(2) #14 X 3/4”Sheet Metal

Screws

1/4-20 X 1” Bolt w/ Washer

Evaporator Installation

1. Lift evaporator unit up under the dashboard (See Figure 15, below). Secure loosely to the firewall from the engine compartment side using a 1/4-20 x 1” bolt and washer (See Figure 15, below).

2. Using (2) #14 x 3/4” sheet metal screws, secure the front evaporator mounting bracket to the inner cowl (See Figure 15, below).

3. Verify that evaporator unit is level and square to the dash, and then tighten all mounting bolts. NOTE: Tighten the bolt on the firewall first, and then tighten the front mounting bracket screws.

#10 A/C Hose

#6 A/C Hose

PressTape

HeaterHose

HoseClamps

Figure 15a

Figure 15


OEMCenter Louver

Assembly

65118-VUPCut Foam Strip

Approximately 7”

Center Louver Installation

MountingHoles

62618-VCECenter Louver

HoseAdapter

(2) #8 X 1/2”Pan Head

Screws

Center LouverDuct HosesOEM Screws

1. Install foam strip onto center louver assembly as shown in Figure 16, below.

2. Install center louver duct hose adapter onto center louver assembly (See Figure 16, below).

3. Using the (2) mounting holes on the bottom side of the duct hose adapter as a guide, drill (2) 1/8” holes in the louver assembly. Secure duct hose adapter to louver assembly using (2) #8 x 1/2” pan head screws (See Figure 16a, below).

4. Reinstall dash.

5. Pull center louver duct hoses through dash and attach to center louver duct hose adapter as shown in Figure 16, below.

6. Install center louver assembly into dash, using OEM mounting screws to secure louver assembly to dash (See Figure 16, below).

Figure 16

Figure 16a

Figure 16b


1. Locate evaporator drain on bottom of evaporator case.

2. In line with the drain, lightly make a mark on the firewall. Measure one inch down and drill a 5/8” hole through the firewall (See Figure 17, right).

3. Install drain hose to bottom of evaporator unit and route through firewall (See Figure 17, right).

1. Install hose adapters as shown in Figure 18, below.

2. Once hose adapters are installed, drill (2) 7/64” holes in OEM under dash louver assemblies as shown in Figure 18a, below.

1” DrainFigure 17

Figure 18

Figure 18a

DrainHose

Driver SideHose Adapter627178-FCE

Passenger SideHose Adapter627177-FCE

#8 X 1/2”Pan Head

Screws

Drill(2) 7/ 64”

Holes

Drill(2) 7/ 64”

Holes

Drain Hose Installation

Under Dash Louver DuctHose Adapter Installation


Twist WithThis

Wrench

Hold WithThis

Wrench

1. Refer to separate instructions included with modified hose kit.

For a proper seal of fittings:Install supplied O-rings as shownand lubricate with supplied oil.

FemaleNut

MaleInsert

Supplied Oilfor O-rings

#6 O-ring

#8 O-ring #10 O-ring

Figure 19

O-ring,Slide OverMale Insert to Swaged Lip

O-ring

O-ring

Lubricating O-rings

1974-78 Camaro Standard Hose Kit

Modified A/C Hose Kit

1. Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 19, above) and connect the 90° female fitting w/ R134a service port to the #8 discharge port on the compressor. Route the 45° female fitting to the #8 condenser hardline coming through the core support (See Figure 21, Page 18). Tighten each fitting connection as shown in Figure 19, above.

2. Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 19, above) and connect the #10 135° female fitting w/ R134a service port to the #10 suction port on the compressor. Route the 90° female fitting to the #10 evaporator (See Figure 15a, Page 13, and Figure 21, Page 18). Tighten each fitting connection as shown in Figure 19, above.

3. Locate the #6 evaporator A/C hose. Lubricate (2) #6 O-rings (See Figure 19, above) and connect the 90° female fitting to the #6 hardline coming through the core support from the drier. Route the 90° female fitting to the #6 evaporator (See Figure 15a, Page 13, and Figure 21, Page 18). Tighten each fitting connection as shown in Figure 19, above.

1970-73 Camaro Standard Hose Kit1. Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 19, above) and connect the 90° female fitting w/ R134a service port to the #8 discharge port on the compressor. Route the 45° female fitting to the #8 condenser hardline coming through the core support (See Figure 20, Page 17). Tighten each fitting connection as shown in Figure 19, above.

2. Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 19, above) and connect the #10 135° female fitting w/ R134a service port to the #10 suction port on the compressor. Route the 90° female fitting to the #10 evaporator (See Figure 15a, Page 13, and Figure 20, Page 17). Tighten each fitting connection as shown in Figure 19, above.

3. Locate the #6 evaporator A/C hose. Lubricate (2) #6 O-rings (See Figure 19, above) and connect the 45° female fitting to the #6 hardline coming through the core support from the drier. Route the 90° female fitting to the #6 evaporator (See Figure 15a, Page 13, and Figure 20, Page 17). Tighten each fitting connection as shown in Figure 19, above.


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Heater Hose & Heater Control Valve Installation1. Route a piece of heater hose from the water pump to the top heater fitting of the heater core as shown in Figure 15a, Page 13, and Figure 20, below. Secure using hose clamps.2. Route a piece of heater hose from the intake to the bottom heater fitting of the heater core as shown in Figure 15a, Page 13, and Figure 20, below. NOTE: Install heater control valve in line with intake manifold (pressure side) heater hose, and secure using hose clamps as shown in Figure 20, below. Also note proper flow direction.

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Heater Hose & Heater Control Valve Installation1. Route a piece of heater hose from the water pump to the top heater fitting of the heater core as shown in Figure 15a, Page 13, and Figure 21, below. Secure using hose clamps.2. Route a piece of heater hose from the intake to the bottom heater fitting of the heater core as shown in Figure 15a, Page 13, and Figure 21, below. NOTE: Install heater control valve in line with intake manifold (pressure side) heater hose, and secure using hose clamps as shown in Figure 21, below. Also note proper flow direction.

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Glove Box

1. Reinstall under dash louvers using OEM screws as shown in Figure 23, below.2. Connect duct hose to louvers (See Figure 24, Page 20).

Final Steps

Glove Box Installation

Under Dash Louver Installation

3/8” ID Grommet33144-VUI

1. Install duct hoses as shown in Figure 24, Page 20. 2. Route A/C wires through 3/8” grommet as shown in Figure 22a, below (12 volt/ground/binary switch/ heater valve). 3. Install control panel assembly. 4. Plug the wiring harnesses into the ECU module on sub case as shown in Figure 24, Page 20 (Wire according to wiring diagram on Pages 21 and 22). 5. Glove box installation (See Figure 22, below). 6. Install under dash louver assembly (See Figure 23, below). 7. Reinstall all previously removed items (battery box & battery). 8. Fill radiator with at least a 50/50 mixture of approved antifreeze and distilled water. It is the owner’s responsibility to keep the freeze protection at the proper level for the climate in which the vehicle is operated. Failure to follow antifreeze recommendations will cause heater core to corrode prematurely and possibly burst in A/C mode and/or freezing weather, voiding your warranty. 9. Double check all fittings, brackets and belts for tightness.10. Vintage Air recommends that all A/C systems be serviced by a certified automotive air conditioning technician.11. Evacuate the system for a minimum of 45 minutes prior to charging and leak check prior to servicing.12. Charge the system to the capacities stated on the information page (Page 4) of this instruction manual.13. See Operation of Controls procedures on Page 23.

1. Install glove box provided, and secure with #8 screws through OEM holes (See Figure 22, below).2. Install glove box door.

NOTE: If equipped with the glove box light as shown below in Figure 22b, modify plastic glove box using template provided on Page 27.

Figure 22bFigure 22

Figure 23

Figure 22a

Wiring Harness(12 Volt/Grounds/

Binary Switch)

Wiring Harness(Heater Control Valve)


Control Panel & Duct Hose Routing

BACK SIDEOF PC BOARDASSEMBLY

Control PanelHarness

From ECU232007-VUR

Under DashDriver Side2” X 25”

PlugFromWiring

Harness232001-VUR

Passenger SideLouver

2 ½” X 50”

Driver SideLouver

2 ½” X 36”

Driver SideDefrost Duct

2” X 22”

Center LouverDriver Side2 ½” X 20”

Center LouverPassenger Side

2 ½” X 20”

Under DashPassenger Side

2” X 25”

PlugFrom

ControlWiring

Harness232007-VUR

Passenger SideDefrost Duct

2” X 22”

Figure 24


WHT/GRN

WHT/YELWHT/RED

RED

WHTBACKLIGHT NEG

FAN WIPER

MODE WIPER

TEMP WIPER

5V-SW

GND

BACKLIGHT POS

AC ANNUNCIATOR

PRE-WIRED

GEN IV WIRING DIAGRAMREV D, 5/6/2014

GEN IV ECU

PROGRAM

Wiring Diagram

TEMP

MODE

FAN

A/C(IF USED)

232007-VUR

232002-VUA

** CIRCUITBREAKER30 AMP

*** WIDE OPENTHROTTLESWITCH

(OPTIONAL)

* DASH LAMP(IF USED)

Dash Lamp Is Used Only With Type 232007-VUR Harness.Warning: Always Mount Circuit Breaker As Close to the Battery As Possible. (NOTE: Wire BetweenBattery and Circuit Breaker Is Unprotected and Should Be Carefully Routed to Avoid a ShortCircuit).Wide Open Throttle Switch Contacts Close Only at Full Throttle, Which Disables A/C Compressor.

JF8

BLK

ORA

TAN

VIEWED FROM WIRE SIDE

••

•

HEATERCONTROL VALVE


RED

CIRCUIT BREAKER30 AMP

+

+

-

BLACK

REDWHITE

RED

CHASSIS GROUND

A/CCOMPRESSOR

RELAY

Ignition Switch:

Dash Light:

NOTE: MOUNT RELAYIN DESIRED LOCATION

UNDER DASH

GREEN

FIREWALL

BLUE

BLUE

RED &

WHITE

VIOLET

(IGNITION HOTTERMINAL)

IGNITION SWITCH

DASH BACK LIGHT+0-12vTAN

GRAY

BLUE

WHITE

WHITE

REDRED

WHITE

COMPRESSOR

BATTERY

NOTE: CONNECT WHITEWIRES DIRECTLY TO

(-) BATTERY TERMINAL

BATRUN

12V

RED GREEN

RED

RED

BLUE

LATCH

BLACK

BINARYSAFETYSWITCH

YELLOW

ORANGE

WIRING HARNESS

Violet 12V Ign Switch Source (Key On Accessory) Position Must Be Switched.

Tan Wire Used Only With Vintage Air Supplied Control Panel With LED Back Light.

Binary: Connect As Shown (Typical Compressor Wiring). Be Sure Compressor Body Is Grounded.

Trinary Switch: Connect According To Trinary Switch Wiring Diagram.

Install With Servo Motor Facing Down, As Shown. Note Flow Direction Arrow Molded Into Valve Body, And Install Accordingly.

White Must Run To (-) Battery. Red May Run To (+) Battery Or Starter. Mount Circuit Breaker As Close to Battery As Possible.

Heater Control Valve:

Binary/Trinary & Compressor:

Circuit Breaker/Battery:

CONTROL WIRING HARNESS

NOTE: YELLOW & ORANGE

COMING FROM HARNESS ARE NOT

USED.

WIRING HARNESS

GRAY WIRE IS USED FOR PROGRAMING CONTROLS

IF APPLICABLE

WIRING HARNESS

Gen IV Wiring Connection Instruction

HEATERCONTROL VALVE

WARNING: ALWAYS MOUNT CIRCUIT BREAKER

AS CLOSE TO THE BATTERY AS POSSIBLE. (NOTE: WIRE BETWEEN BATTERY AND CIRCUIT BREAKER IS UNPROTECTED

AND SHOULD BE CAREFULLY ROUTED TO AVOID A SHORT CIRCUIT).

NOTE: HEATER CONTROL VALVE CONNECTION AND CHASSIS GROUND MAY BE LOCATED ON EITHER SIDE OF THE FIREWALL. ENSURECONNECTOR IS LATCHED

FIRMLY.


Operation of Controls

Adjust to desiredspeed.

Blower SpeedAdjust to desired

speed.

Adjust to desiredmode position (DASH position recommended).

Adjust to desiredspeed.

Adjust to DEFROST position for maximum defrost, or between FLOOR and DEFROST positions for a bi-level

blend (Compressor is automatically engaged).

Adjust to desired temperature.

For A/C operation, adjust tocoldest position to engage

compressor (Adjust between HOT and COLD to reachdesired temperature).

A/C Operation

Heat Operation

Defrost/De-fog Operation

On Gen IV systems with three lever/knob controls, the temperature control toggles between heat and A/C operations. To activate A/C, move the temperature lever/knob all the way to cold and then back it off to the desired vent temperature. For heat operation, move the temperature lever/knob all the way to hot and then adjust to the desired vent temperature. The blower will momentarily change speed, each time you toggle between operations, to indicate the change.

Blower Speed

Blower Speed

This lever/knob controlsblower speed, from

OFF to HI.

This lever/knob controls the mode positions,from DASH to FLOORto DEFROST, with a blend in between.

This lever/knob controlsthe temperature,

from HOT to COLD.

Blower Speed

Mode Control

Temperature Control

Blower Speed

TemperatureControl

Mode Control

Temperature Control

Temperature Control

Temperature Control

Mode Control

Mode Control

Mode Control

For maximum heating, adjust to hottest position (Adjust between HOT and COLD to reach desired temperature).Adjust to desired

mode position(FLOOR position recommended).

DASH

HOT

A/C Light

DASH

HOT

DASH

HOT

DASH

HOT

NOTE: A/C operation toggles on & off when temperature control is moved to the HOT or COLD ends of travel. A/C operation is indicated by the blue A/C light.


Sym

pto

m

C

on

dit

ion

Ch

eck

s

Act

ion

s

N

ote

s

Blo

wer

sta

ys o

n

hig

h s

pee

d w

hen

ig

nitio

n is

on.

1a.

No o

ther

funct

ions

work

.

Chec

k fo

r dam

aged

pin

s or

wires

in c

ontr

ol hea

d p

lug.

Ver

ify

that

all

pin

s ar

e in

sert

ed into

plu

g.

Ensu

re t

hat

no

pin

s ar

e ben

t or

dam

aged

in E

CU

.

Chec

k fo

r dam

aged

gro

und

wire

(white)

in c

ontr

ol hea

d

har

nes

s.

Ver

ify

continuity

to c

has

sis

gro

und w

ith w

hite

contr

ol

hea

d w

ire

at v

ario

us

poin

ts.

Loss

of gro

und o

n t

his

wire

render

s co

ntr

ol hea

d

inoper

able

.

All

oth

er f

unct

ions

work

.Chec

k fo

r dam

aged

blo

wer

sw

itch

or

pote

ntiom

eter

and

asso

ciat

ed w

irin

g.

Blo

wer

sta

ys o

n

hig

h s

pee

d w

hen

ig

nitio

n is

on o

r off.

Unplu

g 3

-wire

BSC c

ontr

ol

connec

tor

from

ECU

. If

blo

wer

sh

uts

off,

ECU

is

eith

er

impro

per

ly w

ired

or

dam

aged

.

Be

sure

the

smal

l, 2

0 G

A w

hite

gro

und w

ire

is c

onnec

ted

to t

he

bat

tery

gro

und p

ost

. If

it

is,

repla

ce t

he

ECU

.

Unplu

g 3

-wire

BSC c

ontr

ol

connec

tor

from

ECU

. If

blo

wer

st

ays

runnin

g,

BSC is

eith

er

impro

per

ly w

ired

or

dam

aged

.

Chec

k to

ensu

re t

hat

no B

SC w

irin

g is

dam

aged

or

short

ed t

o v

ehic

le g

round.

The

BSC o

per

ates

the

blo

wer

by

gro

und s

ide

puls

e w

idth

modula

tion s

witch

ing.

The

posi

tive

wire

to t

he

blo

wer

will

alw

ays

be

hot.

If th

e “g

round”

side

of

the

blo

wer

is

short

ed t

o c

has

sis

gro

und,

the

blo

wer

will

run o

n H

I.

Rep

lace

BSC (

This

will

req

uire

rem

oval

of

evap

ora

tor

from

veh

icle

).N

o o

ther

par

t re

pla

cem

ents

sh

ould

be

nec

essa

ry.

Com

pre

ssor

will

not

turn

on

(All

oth

er funct

ions

work

).

2.

Sys

tem

is

not

char

ged

.Sys

tem

must

be

char

ged

for

com

pre

ssor

to e

ngag

e.Char

ge

syst

em o

r byp

ass

pre

ssure

sw

itch

.

Dan

ger:

Never

byp

ass

sa

fety

sw

itch

wit

h

en

gin

e r

un

nin

g.

Seri

ou

s in

jury

can

resu

lt.

Sys

tem

is

char

ged

.

1b

.

Tro

ub

lesh

oo

tin

g G

uid

e

Chec

k fo

r fa

ulty

A/C

pote

ntiom

eter

or

asso

ciat

ed

wirin

g (

Not

applic

able

to 3

-pot

contr

ols

).

Chec

k fo

r dis

connec

ted o

r fa

ulty

ther

mis

tor.

Chec

k co

ntinuity

to g

round o

n w

hite

contr

ol hea

d w

ire.

Chec

k fo

r 5V o

n r

ed c

ontr

ol hea

d w

ire.

Chec

k 2-p

in c

onnec

tor

at E

CU

housi

ng.

To c

hec

k fo

r pro

per

pot

funct

ion,

chec

k vo

ltag

e at

w

hite/

blu

e w

ire.

Voltag

e sh

ould

be

bet

wee

n 0

V a

nd

5V,

and w

ill v

ary

with p

ot

leve

r posi

tion.

Dis

connec

ted o

r fa

ulty

ther

mis

tor

will

cau

se

com

pre

ssor

to b

e dis

able

d.

Red

wire

at A

/C p

ot

should

hav

e ap

pro

xim

atel

y 5V

with ignitio

n o

n.

White

wire

will

hav

e co

ntinuity

to

chas

sis

gro

und.

White/

Blu

e w

ire

should

var

y bet

wee

n 0

V a

nd 5

V w

hen

le

ver

is m

oved

up o

r dow

n.

3. Com

pre

ssor

will

not

turn

off

(A

ll oth

er funct

ions

work

).

Chec

k fo

r fa

ulty

A/C

pote

ntiom

eter

or

asso

ciat

ed

wirin

g.

Chec

k fo

r fa

ulty

A/C

rel

ay.

Rep

air

or

repla

ce p

ot/

contr

ol w

irin

g.

Rep

lace

rel

ay.

See

blo

wer

sw

itch

chec

k pro

cedure

.


Sym

pto

m

C

on

dit

ion

Ch

eck

s

Act

ion

s

N

ote

s

Sys

tem

will

not

turn

on,

or

runs

inte

rmitte

ntly.

4.

Work

s w

hen

engin

e is

not

runnin

g;

shuts

off w

hen

en

gin

e is

sta

rted

(T

ypic

ally

ear

ly G

en I

V,

but

poss

ible

on a

ll ve

rsio

ns)

.

Nois

e in

terf

eren

ce f

rom

either

ig

nitio

n o

r al

tern

ator.

Inst

all ca

pac

itors

on ignitio

n c

oil

and a

lter

nat

or. E

nsu

re

good g

round a

t al

l poin

ts.

Rel

oca

te c

oil

and a

ssoci

ated

w

irin

g a

way

fro

m E

CU

and E

CU

wirin

g.

Chec

k fo

r burn

edor

loose

plu

g w

ires

.

Ver

ify

connec

tions

on p

ow

er

lead

, ig

nitio

n lea

d,

and b

oth

white

gro

und w

ires

.

Ver

ify

pro

per

met

er f

unct

ion b

y ch

ecki

ng t

he

conditio

n o

f a

know

n g

ood b

atte

ry.

Ignitio

n n

ois

e (r

adia

ted o

rco

nduct

ed)

will

cau

se t

he

syst

em t

o s

hut

dow

n d

ue

tohig

h v

oltag

e sp

ikes

. If

this

is s

usp

ecte

d,

chec

k w

ith a

qual

ity

osc

illosc

ope.

Spik

esgre

ater

than

16V w

ill s

hut

dow

n t

he

ECU

. In

stal

l a

radio

cap

acitor

at t

he

posi

tive

post

of th

e ig

nitio

nco

il (S

ee r

adio

cap

acitor

inst

alla

tion b

ulle

tin).

A

faulty

alte

rnat

or

or

worn

out

bat

tery

can

als

o r

esult

in t

his

conditio

n.

Will

not

turn

on u

nder

an

y co

nditio

ns.

Ver

ify

bat

tery

voltag

e is

gre

ater

than

10 v

olts

and les

sth

an 1

6.

Loss

of m

ode

door

funct

ion.

No m

ode

chan

ge

at a

ll.Chec

k fo

r dam

aged

mode

switch

or

pote

ntiom

eter

and

asso

ciat

ed w

irin

g.

Part

ial fu

nct

ion o

f m

ode

doors

.

Typic

ally

cau

sed b

y ev

apora

tor

housi

ng

inst

alle

d in a

bin

d in t

he

vehic

le.

Be

sure

all

mounting loca

tions

line

up

and d

on’t h

ave

to b

e fo

rced

in

to p

osi

tion.

Blo

wer

turn

s on

and o

ff r

apid

ly.

6.

Bat

tery

voltag

e is

at

leas

t 12V.

Chec

k fo

r at

lea

st 1

2V a

t ci

rcuit b

reak

er.

Ensu

re a

ll sy

stem

gro

unds

and p

ow

er c

onnec

tions

are

clea

n a

nd t

ight.

Bat

tery

voltag

e is

les

s th

an 1

2V.

5.

Tro

ub

lesh

oo

tin

g G

uid

e (

Co

nt.

)

Chec

k fo

r fa

ulty

bat

tery

or

alte

rnat

or.

Char

ge

bat

tery

.

Sys

tem

shuts

off b

low

er a

t 10V.

Poor

connec

tions

or

wea

k bat

tery

can

cau

se

shutd

ow

n a

t up t

o 1

1V.

7. When

ignitio

n is

turn

ed o

n,

blo

wer

m

om

enta

rily

co

mes

on,

then

sh

uts

off.

This

occ

urs

with t

he

blo

wer

sw

itch

in

the

OFF

posi

tion.

This

is

an indic

ator

that

the

syst

em h

as b

een r

eset

. Be

sure

the

red p

ow

er w

ire

is o

nth

e bat

tery

post

, an

d n

ot

on a

sw

itch

ed s

ourc

e. A

lso,

if

the

syst

em is

pulle

d b

elow

7V f

or

even

a s

plit

sec

ond,

the

syst

em w

ill r

eset

.

Run r

ed p

ow

er w

ire

direc

tly

to b

atte

ry.

Chec

k fo

r posi

tive

pow

er a

t hea

ter

valv

e gre

en w

ire

and

blo

wer

red

wire.

Chec

k fo

r gro

und o

n c

ontr

ol hea

d w

hite

wire.

Chec

k fo

r obst

ruct

ed o

r bin

din

g m

ode

doors

.

Chec

k fo

r dam

aged

ste

pper

m

oto

r or

wirin

g.

Err

atic

funct

ions

of

blo

wer

, m

ode,

te

mp,

etc.

Chec

k fo

r dam

aged

sw

itch

or

pot

and a

ssoci

ated

wirin

g.

Rep

air

or

repla

ce.

8.


CUT ALONGDOTTED LINE

CU

T A

LON

GD

OTT

ED L

INE

Kick Panel Modification Template


1 3

/8”

3/4

”1

”

Glo

ve B

ox L

igh

t Tem

pla

te

Tem

pla

teCut

Alo

ng

Dott

ed L

ine


1.2.

11

762171781177

1

Accessory Kit781177

6-Vent Evaporator Sub Case w/ 204 ECU

762171

6-Vent Evap orator Sub Case w/ 204 ECUAccessory Kit 1970-78 Camaro with A/C

Checked By:Packed By:

Date:

No. Qty. Part No. Description

Packing ListEvaporator Kit (565073)

2

OFF

DASH

HOT

FLR

HI

DEF

COLD

A C

NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.

1970-78 camaro - speedway motors

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