Roof Beacon Lamp Inoperative
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Roof Beacon Lamp Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Upfitter Provision Schematics
in Wiring Systems Connector End View Reference: Lighting Systems Connector End Views |
|||
| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 | Verify that the roof beacon lamp is inoperative. Does the roof beacon lamp operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
Go to Step 8 | Go to Step 4 |
| 4 | Test the ground circuit of the roof beacon lamp for a high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 5 |
| 5 |
|
Go to Step 9 | Go to Step 6 |
| 6 | Test the following circuits for a high resistance, open or a short to ground:
Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 7 |
| 7 | Test the ground circuit of the roof beacon relay for a high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 10 |
| 8 | Replace the bulb or lamp assembly. Refer to upfitter instructions. Did you complete the replacement? |
Go to Step 11 | - |
| 9 | Replace the roof beacon switch. Did you complete the replacement? |
Go to Step 11 | - |
| 10 | Replace the roof beacon relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
in Wiring Systems. Did you complete the replacement? |
Go to Step 11 | - |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |