Off-Road 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.
Off-Road 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 | Verify that the off-road lamps are inoperative. Do the off-road lamps operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Is only one off-road lamp inoperative? | Go to Step 4 | Go to Step 6 |
| 4 | Test the supply voltage circuit of the inoperative lamp for high resistance, short to ground or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | 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 21 | Go to Step 13 |
| 6 | Connect a test lamp between the battery positive voltage circuit of the off-road lamps switch, and a good ground. Does the test lamp illuminate? |
Go to Step 7 | Go to Step 16 |
| 7 | Connect a 3-amp fused jumper wire between the battery positive circuit and the off-road lamp relay control circuit of the off-road lamps switch. Do the off-road lamps illuminate? |
Go to Step 15 | Go to Step 8 |
| 8 | Connect a 3-amp fused jumper wire between the battery positive circuit and the off-road lamp supply voltage circuit of the off-road lamps relay. Do the off-road lamps illuminate? |
Go to Step 9 | Go to Step 11 |
| 9 | Test the off-road lamp relay control circuit of the off-road lamps switch for high resistance, short to ground or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 10 |
| 10 | Test the ground circuit of the off-road lamps relay for high resistance, or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 11 |
| 11 | Test the battery positive voltage circuit of the off-road lamps relay for high resistance, or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 12 |
| 12 | Test the ground circuit of the off-road lamps for high resistance, or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 17 |
| 13 | Inspect for poor connections at the harness connector of the off-road lamp. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 18 |
| 14 | Inspect for poor connections at the harness connector of the off-road lamps relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 19 |
| 15 | Inspect for poor connections at the harness connector of the off-road lamps switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 20 |
| 16 | Repair the battery positive voltage circuit of the off-road lamps switch. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 21 | - |
| 17 | Repair the supply voltage circuit of the off-road lamps. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 21 | - |
| 18 | Replace the inoperative off-road lamp. Refer to Off Road Lamp Replacement (Low Profile) or Off Road Lamp Replacement (Base) . Did you complete the replacement? |
Go to Step 21 | - |
| 19 | Replace the inoperative off-road lamps relay. Refer to Relay Replacement (Attached to Wire Harness)
or Relay Replacement (Within an Electrical Center)
. Did you complete the replacement? |
Go to Step 21 | - |
| 20 | Replace the off-road lamps switch. Refer to Off Road Lamp Switch Replacement . Did you complete the replacement? |
Go to Step 14 | - |
| 21 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |