Park Lamps Inoperative
Park Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics (H/D Trailer Wiring) , Exterior Lights Schematics (L/D Trailer Wiring) | |||
| 1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 | Place the headlamp and panel dimmer switch in the ON position. Does the system operate normally? |
Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
| 3 | Are all park lamps inoperative? | Go to Step 7 | Go to Step 4 |
| 4 | Is only one lamp inoperative? | Go to Step 5 | Go to Step 6 |
| 5 | Is it a rear lamp that is inoperative? | Go to Step 12 | Go to Step 9 |
| 6 | Are both front lamps inoperative? | Go to Step 11 | Go to Step 17 |
| 7 | Test the battery positive voltage circuit of the headlamp and panel dimmer switch for high resistance, an 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 21 | Go to Step 8 |
| 8 | Test the park lamp switch signal circuit of the headlamp and panel dimmer switch for high resistance, an 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 21 | Go to Step 16 |
| 9 | Remove and inspect the inoperative lamp. Is the lamp OK? |
Go to Step 10 | Go to Step 14 |
| 10 | Test the front park lamp supply voltage circuit of the inoperative lamp for an open. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 17 |
| 11 | Test the front park lamp supply voltage circuit of the engine wiring harness junction block for a short to ground. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 17 |
| 12 | Remove and inspect the inoperative lamp Is the lamp OK? |
Go to Step 13 | Go to Step 15 |
| 13 | Test the rear park lamps supply voltage circuit of the inoperative lamp for 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 21 | Go to Step 17 |
| 14 | Inspect for poor connections at the harness connector of the front bulb. Refer to Testing for Intermittent Conditions and Poor Connections
, and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 18 |
| 15 | Inspect for poor connections at the harness connector of the rear bulb. Refer to Testing for Intermittent Conditions and Poor Connections
, and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 19 |
| 16 | Inspect for poor connections at the harness connector of the headlamp and panel dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections
, and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 21 | Go to Step 20 |
| 17 | Repair the park lamps ground circuit. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 21 | - |
| 18 | Replace the parking lamp. Refer to Parking and Turn Signal Lamp Replacement (Old Style) . Did you complete the replacement? |
Go to Step 21 | - |
| 19 | Replace the parking lamp. Refer to Tail/Turn Signal Lamp Replacement (Pickup) , Tail/Turn Signal Lamp Replacement (Pickup Step Side) . Did you complete the replacement? |
Go to Step 21 | - |
| 20 | Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? |
Go to Step 21 | - |
| 21 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |