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Check fuses
First check all your fuses and if that's not it you'll have to trace your wiring ,to make sure their not grounding out.
Blade Type ATO/ATC Automotive Fuses: 10A for the turn signal lamps & 15A for the Brake/Hazard Lamps. Hope that helps.
I'd suggest checking your fuses. My 1999 GMC burban has multiple fuses for different sets of lights. If they are the same I'd start by checking fuse: 9 - 20A Park Lamps. That should be for your License Lamp, Parking Lamps, Taillamps, Roof Marker Lamps, Tailgate Lamps, Front Sidemarkers, Fog Lamp Relay, Door Switch Illumination, Fender Lamps, Headlamp Illumination. It might worth chekcing fuses 1 & 3 as well since these also cover some of the illumination/lap accessories. I'd look in the index of your manual to get a detailed description of what your fuses are as well. I'm assuming the fuse configuration is the same as my 99 since they body styles would be the same. Good Luck.
Check, Fuses, Bulbs, Switch,
Did you change the head lamps bulb.Try that and see if that help's.
Check bulbsCheck switch
Amber.
Amber
If you are referring to your power door lock on the driver's door, I know that on my 1995 Explorer XLT, in the jack storage compartment there are relays for driver door unlock/all door unlock/all door lock/ and two more relays for interior lamps and trailer park lamps.
the 1973 f body fuses are separate for park lamps and dash lamps, so it must be in the light switch itself.
troubleshoot head lamps on 1988 grand marquis? Not working...fuses OK