Service manual

Body and Accessories Lighting Systems 8-99
2006 LSSV Service Manual Supplement
Blackout (B/O) Stoplamps Inoperative (cont’d)
Step Action Yes No
14
Replace the blackout (B/O) stoplamp(s). Refer to
Taillamp/Blackout (B/O) Lamp Replacement.
Did you complete the replacement? Go to Step 15
___
15
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 Inoperative
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 inoperative.
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 Are all marker lamps inoperative? Go to Step 4 Go to Step 8
4
Inspect the fuse(s), check for damaged or corroded inline
connectors, check for broken or partially broken wires inside
insulation, and for properly installed aftermarket equipment.
Did you find the condition? Go to Step 5 Go to Step 6
5
Make necessary repairs.
Did you complete the repairs? Go to Step 14
___
6
1. Place blackout (B/O) service switch in blackout (B/O)
mode.
2. Connect a test lamp at cavity A circuit 911 (PK) wire at
blackout (B/O) service switch and ground.
Does the test lamp illuminate? Go to Step 7 Go to Step 14
7
Test the supply voltage circuit of the inoperative lamp for high
resistance, or an open. Refer to Circuit Testing, and Wiring
Repairs in Wiring Systems in 2006 C/K Truck Service Manual.
Did you find and correct the condition? Go to Step 11 Go to Step 10
8
Test the ground circuit of the inoperative lamp for high
resistance, or an open. Refer to Circuit Testing, and Wiring
Repairs in Wiring Systems in 2006 C/K Truck Service Manual.
Did you find and correct the condition? Go to Step 18 Go to Step 9
9
Test the ground circuit of the inoperative lamp for high
resistance, or an open. Refer to Circuit Testing, and Wiring
Repairs in Wiring Systems in 2006 C/K Truck Service Manual.
Did you find and correct the condition? Go to Step 18 Go to Step 12