lighting and wiring service chapter 37 page 477. four types of electrical problems open circuit-...

Lighting and Lighting and Wiring ServiceWiring Service

Chapter 37Chapter 37Page 477Page 477

Four Types of Electrical Four Types of Electrical ProblemsProblems

Open Circuit- when a circuit has a Open Circuit- when a circuit has a break in continuity.break in continuity.

Short Circuit- is a current path that is Short Circuit- is a current path that is unwanted, causes burnt wires and unwanted, causes burnt wires and parts.parts.

Grounded Circuit- short that are Grounded Circuit- short that are directed to grounddirected to ground

Excessive resistance- corrosion causes Excessive resistance- corrosion causes less power to go through the less power to go through the conducted and it also picks up heat.conducted and it also picks up heat.

Circuit DefectsCircuit Defects

Open Circuits

Circuit DefectsCircuit Defects

Short Circuits

Circuit DefectsCircuit Defects

Ground Circuits

Wiring DiagramsWiring DiagramsNewer Style Diagrams

Older Style DiagramOlder Style Diagram

Electrical Electrical SymbolsSymbols

WiringWiring

Yellow and Red for positive voltage use and Black for ground use.

Different types of wires

Solderless ConnectorsSolderless Connectors1

2 3

4

5

6

Wire toolsWire tools Auto strippers

Crimping area

Cutter section

Stripper section

Large terminal crimpersSmall screw cutters

RepairRepair

Stripping Wire Crimp type repair

Soldering Repair

Crimping connector

Slicing a WireSlicing a Wire

Soldering Soldering

Use for wiring Use for copper, brass, and aluminum (radiator work)

Acid CoreRosin Core

ToolsTools

Gun Iron

Heat gun Multimeter

FusesFuses Don’t forget to check fuses and holdersDon’t forget to check fuses and holders You can test for fuse problems with a test You can test for fuse problems with a test

light or multimeter.light or multimeter.

Replacing HeadlightsReplacing Headlights

Light bulb ServiceLight bulb Service

Make sure the aligning notches engageDon’t handle glass with halogen bulbs*Wipe off fingerprints (alcohol)

FlashersFlashers If the flasher will work in one direction If the flasher will work in one direction

only, the flasher is the problem.only, the flasher is the problem.

Wipers and WashersWipers and Washers Check the fuse firstCheck the fuse first Check the washer for fluid Check the washer for fluid Check the lines and nozzles for blockage.Check the lines and nozzles for blockage.

Horns Horns Always check the fuse firstAlways check the fuse first Check the relayCheck the relay Check for voltage at horn and check Check for voltage at horn and check

for a good groundfor a good ground You an use a jumper wire to the You an use a jumper wire to the

battery to find out if a horn is good.battery to find out if a horn is good.

Horns Horns Check the fuse firstCheck the fuse first You can use a jumper wire to the battery You can use a jumper wire to the battery

to test the hornto test the horn Check the horn’s groundCheck the horn’s ground They are easier to diagnose if there are They are easier to diagnose if there are

multiple hornsmultiple horns

Your Job.Your Job. Complete chapter Questions 1-15 Complete chapter Questions 1-15

(review) and 1-10 (ASE-style). Page 492(review) and 1-10 (ASE-style). Page 492 Write on a separate paper and write out Write on a separate paper and write out

the complete question and your answer. the complete question and your answer. ( do not write the other answer options). ( do not write the other answer options).

Complete the chapter worksheet (I will Complete the chapter worksheet (I will give it out). You may write on it. give it out). You may write on it.

File all items in your note book.File all items in your note book. Notebooks will be graded in the future.Notebooks will be graded in the future.