Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics | |||
1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | |
2 |
Do the park lamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Are all of the park lamps inoperative? | Go to Step 6 | Go to Step 4 |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 22 |
5 | Connect a test lamp between the supply voltage circuit of the inoperative park lamp and the ground circuit of the inoperative park lamp. Does the test lamp illuminate? | Go to Step 19 | Go to Step 24 |
6 | With a scan tool, observe the Park Lamp Switch parameter in the Instrument Cluster (IPC) inputs data List. Does the scan tool indicate that the Park Lamp Switch parameter is ON? | Go to Step 9 | Go to Step 7 |
7 |
Does the scan tool indicate that the Park Lamp Switch parameter is ON? | Go to Step 8 | Go to Step 14 |
8 | Connect a 3 amp fused jumper between the park lamp switch signal circuit and the ground circuit of the headlamp switch. Does the scan tool indicate that the Park Lamp Switch parameter is ON? | Go to Step 17 | Go to Step 25 |
9 |
Do hear a click when you command the PARK LAMPS relay ON and OFF? | Go to Step 12 | Go to Step 10 |
10 |
Connect a test lamp between the supply voltage circuit of the PARK LAMPS relay coil and a good ground. Does the test lamp illuminate? | Go to Step 11 | Go to Step 16 |
11 |
Does the test lamp turn ON and OFF with each command? | Go to Step 18 | Go to Step 15 |
12 |
Does the test lamp illuminate? | Go to Step 13 | Go to Step 23 |
13 | Connect a 20 amp fused jumper between the battery positive voltage circuit of the PARK LAMPS relay switch and the supply voltage circuit of the park lamps. Do the park lamps illuminate? | Go to Step 18 | Go to Step 22 |
14 | Test for an open or high resistance in the park lamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 20 |
15 | Test for an open or high resistance in the control circuit of the PARK LAMPS relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 21 |
16 | Test for an open or high resistance in the supply voltage circuit of the PARK LAMPS relay coil. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 21 |
17 | Inspect for poor connections at the headlamp 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 31 | Go to Step 26 |
18 | Inspect for poor connections at the PARK LAMPS relay. 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 31 | Go to Step 27 |
19 | Inspect for poor connections at the inoperative park lamp. 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 31 | Go to Step 28 |
20 | Inspect for poor connections at the Instrument Cluster (IPC). 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 31 | Go to Step 29 |
21 | Inspect for poor connections at the Body Control Module (BCM). 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 31 | Go to Step 30 |
22 | Repair an open or short to ground in the supply voltage circuit of the park lamps. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 31 | -- |
23 | Repair an open or high resistance in the battery positive voltage circuit of the PARK LAMPS relay switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 31 | -- |
24 | Repair an open or high resistance in the ground circuit of the park lamps. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 31 | -- |
25 | Repair an open or high resistance in the ground circuit of the headlamp switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 31 | -- |
26 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 31 | -- |
27 | Replace the PARK LAMPS relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 31 | -- |
28 | Replace the inoperative park lamp. Refer to Park/Turn Signal Lamp Bulb Replacement or Tail Lamp Bulb Replacement . Did you complete the replacement? | Go to Step 31 | -- |
29 | Replace the Instrument Cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console. Did you complete the replacement? | Go to Step 31 | -- |
30 | Replace the Body Control Module (BCM). Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 31 | -- |
31 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
