For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Daytime Running Lamps (DRL) Diagnostic System Check? | -- | Go to Step 2 | Go to Daytime Running Lights (DRL) System Check
2 | Disconnect the automatic light control relay. Do the headlamps turn off? | -- | Go to Step 3 | Go to Step 4
3 | Test for a short to ground in CKT 991. Did you find a short to ground in CKT 991? | -- | Go to Step 8 | Go to Step 5
4 | Test for a short to B+ in CKT 10. Did you find a short to B+ in CKT 10? | -- | Go to Step 7 | Go to Step 6
5 | Replace the automatic lamp control relay. Is the repair complete? | -- | Go to Daytime Running Lights (DRL) System Check | --
6 | Replace the turn/hazard headlamp switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Instrument Panel, Gauges, and Console. Is the repair complete? | -- | Go to Daytime Running Lights (DRL) System Check | --
7 | Repair the faulty CKT. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Daytime Running Lights (DRL) System Check | --
8 | Repair the short to ground in CKT 991. Is the repair complete? | -- | Go to Daytime Running Lights (DRL) System Check | --