Stop Lamps Inoperative
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Stop Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Observe the stop lamps while pressing the brake pedal. Does the system operate normally? |
Go to Testing for Electrical Intermittents | Go to Step 3 |
| 3 | Are all the stop lamps inoperative? | Go to Step 6 | Go to Step 4 |
| 4 | Test the supply voltage circuit of the inoperative lamp for high resistance, an open, or a short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 5 |
| 5 | Test the ground circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 8 |
| 6 | Disconnect the stop lamp switch. Did the stop lamps illuminate? |
Go to Step 9 | Go to Step 7 |
| 7 | Test for the following conditions. Refer to Circuit Testing
and Wiring Repairs
.
Did you find and correct the condition? |
Go to Step 14 | Go to Step 10 |
| 8 | Inspect for poor connections at the harness connector of the bulb or high mount stop lamp. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 12 |
| 10 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 11 | Replace the stop lamp. Refer to Tail Lamp Bulb Replacement (Cadillac) or Tail Lamp Bulb Replacement (Tahoe, Avalanche) or Tail Lamp Bulb Replacement (Yukon) or High Mounted Stop Lamp Replacement (Yukon) or High Mounted Stop Lamp Replacement (Escalade) or High Mounted Stop Lamp Replacement (Avalanche) . Did you complete the replacement? |
Go to Step 14 | - |
| 12 | Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement (Adjustable Pedal) or Stop Lamp Switch Replacement (Non-Adjustable Pedal) . Did you complete the replacement? |
Go to Step 14 | - |
| 13 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 14 | - |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |