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8B-4 LIGHTING SYSTEM
Condition
Flash rate low
Clearance, Tail and Licence Plate Lights Symptom Diagnosis
Condition
One of lights does not
light
No light comes on
when lighting switch
is in "SMALL" posi-
tion
Backup Lights Symptom Diagnosis
Condition
Backup lights do not
light
Backup lights remain
ON
Brake Lights Symptom Diagnosis
Condition
Brake lights do not
light
Brake lights stay ON
Only one brake light
does not light
Possible Cause
Supply voltage too low
Turn signal and hazard warning light relay
faulty
Possible Cause
Bulb burnt out
Wiring or grounding faulty
Fuse blown
Lighting switch faulty
Possible Cause
Fuse blown
Bulb burnt out
Backup light switch faulty
Wiring or grounding faulty
Wiring or grounding faulty
Backup light switch faulty
Possible Cause
Fuse blown
Bulb burnt out
Brake light switch faulty
Wiring or grounding faulty
Brake light switch faulty
Bulb burnt out
Wiring or grounding faulty
Correction
Check charging system referring to
"Generator" in Section 6H.
Check turn signal and hazard
warning light relay referring to
"Turn Signal and Hazard Warning
Light Relay Inspection" in this sec-
tion.
Correction
Replace bulb.
Repair circuit.
Replace fuse to check for short.
Check lighting switch referring to
"Light Control Switch Combination
Unit Inspection" in this section.
Correction
Replace fuse to check for short.
Replace bulb.
Check backup light switch refer-
ring to "Back Up Lamp Switch
Inspection" in Section 7A1.
Repair circuit.
Repair circuit.
Check backup light switch refer-
ring to "Back Up Lamp Switch
Inspection" in Section 7A1.
Correction
Replace fuse to check for short.
Replace bulb.
Adjust or replace brake light switch.
Repair circuit.
Adjust or replace brake light switch.
Replace bulb.
Repair circuit.
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