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Lighting and Wiring
Service
Chapter 37
Page 477
Four Types of Electrical Problems
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Open Circuit- when a circuit has a break in
continuity.
Short Circuit- is a current path that is unwanted,
causes burnt wires and parts.
Grounded Circuit- short that are directed to
ground
Excessive resistance- corrosion causes less
power to go through the conducted and it also
picks up heat.
Circuit Defects
Open Circuits
Circuit Defects
Short Circuits
Circuit Defects
Ground Circuits
Wiring Diagrams
Newer Style Diagrams
Older Style Diagram
Electrical
Symbols
Wiring
Different types of wires
Yellow and Red for positive voltage
use and Black for ground use.
Solderless Connectors
1
2
6
3
5
4
Wire tools
Auto strippers
Cutter section
Stripper section
Crimping area
Small screw cutters
Large terminal crimpers
Repair
Stripping Wire
Crimping connector
Crimp type repair
Soldering Repair
Slicing a Wire
Soldering
Rosin Core
Acid Core
Use for wiring
Use for copper, brass,
and aluminum
(radiator work)
Tools
Gun
Heat gun
Iron
Multimeter
Fuses
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Don’t forget to check fuses and holders
You can test for fuse problems with a test light or
multimeter.
Replacing Headlights
Light bulb Service
Make sure the aligning notches engage
Don’t handle glass with halogen bulbs
*Wipe off fingerprints (alcohol)
Flashers
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If the flasher will work in one direction only, the
flasher is the problem.
Wipers and Washers
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Check the fuse first
Check the washer for fluid
Check the lines and nozzles for blockage.
Horns
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Always check the fuse first
Check the relay
Check for voltage at horn and check for a good
ground
You an use a jumper wire to the battery to find
out if a horn is good.
Horns
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Check the fuse first
You can use a jumper wire to the battery to test the
horn
Check the horn’s ground
They are easier to diagnose if there are multiple horns
Your Job.
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Complete chapter Questions 1-15 (review) and
1-10 (ASE-style). Page 492
Write on a separate paper and write out the
complete question and your answer. ( do not
write the other answer options).
Complete the chapter worksheet (I will give it
out). You may write on it.
File all items in your note book.
Notebooks will be graded in the future.