Stop Lamps Inoperative
WARNING: This page is about a different car, the 2007 Hummer H2. 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 12 | 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 12 | Go to Step 8 |
| 6 | Test the battery positive circuit of the stop lamp switch 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 12 | Go to Step 7 |
| 7 | Test the stop lamp switch signal circuit of the stop lamp switch for a short to ground, high resistance or an open. Refer to Wiring Repairs
. Did you find and correct the condition? |
Go to Step 12 | Go to Step 9 |
| 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 12 | Go to Step 10 |
| 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 12 | Go to Step 11 |
| 10 | Replace the stop lamp. Refer to Tail/Turn Signal Lamp Replacement (SUT) or Tail/Turn Signal Lamp Replacement (SUV) and High Mounted Stop Lamp Replacement (SUT) or High Mounted Stop Lamp Replacement (SUV) . Did you complete the replacement? |
Go to Step 12 | - |
| 11 | Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement . Did you complete the replacement? |
Go to Step 12 | - |
| 12 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |