For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Exterior Lights Schematics
1 | Did you review the Lighting System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Lighting Systems
2 | Verify that the park lamps are inoperative. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3
3 |

1. Turn the ignition switch to the ON position.
2. Place the headlamp switch in the ON position.
3. Use a test lamp to check junction block 2, C3 cavity 9 to ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 5

4 | Use a test lamp to check junction block 1, C6 cavity 9 to ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 7
5 | Connect a test lamp between cavity 3 of the TAIL relay and ground. Do the park and tail lamps illuminate? | Go to Step 9 | Go to Step 8
6 | Repair the open in the GRN wire between the junction block 1, C6 cavity 9 and the junction block 2, C3 cavity 9. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 14 | --
7 | Replace junction block 1. Is the replacement complete? | Go to Step 14 | --
8 | Replace the TAIL Relay. Is the replacement complete? | Go to Step 14 | --
9 | Test for high resistance between cavity 6 of connector C3 of junction block 2 and cavity 16 of the DRL control module connector . Is there high resistance in the LT GRN wire? | Go to Step 10 | Go to Step 11
10 | Test for high resistance between cavity 14 of the turn/signal/headlamp switch connector and cavity 17 of the DRL control module connector. Is there high resistance in the LT GRN/BLK wire? | Go to Step 13 | Go to Step 12
11 | Repair the open in the LT GRN wire between cavity 6 of connector C3 of junction block 2 and cavity 16 of the DRL control module connector . Refer to Wiring Repairs in Wiring Systems. Is the replacement complete? | Go to Step 14 | --
12 | Repair the open in the LT GRN/BLK wire between cavity 17 of the DRL control module connector and cavity 14 of the turn signal/headlamp switch. Refer to Wiring Repairs in Wiring Systems. Is the replacement complete? | Go to Step 14 | --
13 | Replace the DRL module. Refer to Daytime Running Lights (DRL) Control Module Replacement . Is the replacement complete? | Go to Step 14 | --
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3