For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Disconnect the headlamp/instrument panel (IP) lamp dimmer switch connector. Do the lamps turn off? | -- | Go to Step 2 | Go to Step 3
2 | Replace the headlamp/IP lamp dimmer switch. Refer to Headlamp Switch Replacement . Is the repair complete? | -- | Go to Exterior Lights System Check | --
3 | Disconnect the daytime running lamps (DRL) control module. Do the exterior lights turn off? | -- | Go to Daytime Running Lamps (DRL) Headlamps Inoperative | Go to Step 4
4 | Disconnect the theft deterrent relay. Do the exterior lights turn off? | -- | Go to Step 6 | Go to Step 5
5 | Repair a short to B+ in CKT 9. Is the repair complete? | -- | Go to Exterior Lights System Check | --
6 | Refer to Content Theft Deterrent (CTD) System Check Is the repair complete? | -- | Go to Exterior Lights System Check | --