Service manual

Body and Accessories Lighting Systems 8-101
2006 LSSV Service Manual Supplement
Voltmeter Gage Lamp Inoperative (cont’d)
Step Action Yes No
2
Connect a test lamp between cavity A of the voltmeter bulb and
ground.
Does the test lamp illuminate? Go to Step 3 Go to Step 4
3
Connect a self-powered test lamp to cavity B and ground.
Does the test lamp illuminate?
Go to Step 5 Go to Step 6
4
Locate and repair the open or high resistance in circuit 9.
Did you complete the repair? Go to Step 7
___
5
Replace the voltmeter gage bulb. Refer to Voltmeter Gage
Lamp Replacement.
Did you complete the replacement? Go to Step 7
___
6
Locate and repair the open or high resistance in circuit 150.
Did you complete the repair? Go to Step 7
___
7
Operate the system in order to verify the repair.
Did you correct the condition? System OK Go to Step 2
Blackout (B/O) Marker Lamps Always On
Step Action Yes No
Schematic Reference: Exterior Lights Schematics and Interior Lights Schematics
1
Did you review Blackout (B/O) Lighting Description and
Operation?
Go to Step 2
Go to Blackout
(B/O) Lighting
Circuit Operation
2
Verify that the marker lamps are always on.
Do the marker lamps operate normally?
Go to Testing for
Electrical
Intermittents in
Wiring Systems in
2006 C/K Truck
Service Manual Go to Step 3
3
1. Disconnect the blackout (B/O) service switch.
2. Connect a test lamp between circuit 911 (PK) cavity A
wire and ground.
Does the test lamp illuminate?
Go to Step 4 Go to Step 5
4
Repair a short to power in circuit 911 (PK) or circuit 900
(BN/WH) wire(s) between the blackout (B/O) service switch
and blackout (B/O) marker lamps.
Did you complete the repair? Go to Step 6
___
5
Replace the blackout (B/O) service switch. Refer to Blackout
(B/O) Switch Replacement.
Did you complete the replacement? Go to Step 6
___
6
Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 2