'94 Ford Crown Vic Headlights

Use vinegar to unfreeze

No idea sounds like a multiplug connection ?? but i have no idea other than this ,now if it was a renault i would know that pluging it in would be a waste of time to start with as its all encrypted software for dealers only but a ford ?? never so look for a broken wiring connector

1998 Crown Vic, is it a former police vehicle?

I dont see if the turn signal light has to do any thing with the engine shutting off, make sure the IAC idle air control valve is working, air filter is good, fuel filter is good and IF your vehicle has a power steering pressure switch then that could be causing it but with 1985 Crown Vic I dout it.

I guess that means replacing the bulbs didn't work? The only other thing might be the dimmer switch. Its located on the bottom of the steering column, about halfway down fron the steering wheel.

reach underneath and hit the starter housing a few times with a hammer,if it now works either replace the brushes in the starter which cost about $20.00 ,or replace the starter which costs about $90.00.(parts only for both estimates)

Check all the bulbs at tail end for parking and brakes, test grounds and harness for trailer. Check fuses. clean batery terminals, Re instal head light swich properly and make sure all wires conect.
Vitally

Are you sure the bulbs are dim? Could the problem be faded lenses? If so, like most of today's plastic lenses, get yourself a lens restoration kit and follow the instructions.

where is the fuel pump relay on a 2001 crown vic p71

If only the headlights are dull and not putting out the correct light, I would suspect a bad ground (earth) connection somewhere in the headlight circuit or the fuse for the headlight circuit. Something is causing excessive resistance and causing less voltage to be provided for the headlights. If all the lights are dimly lit, then I would check the charging system, the battery and the ground cable for the battery, chassis, and engine.