Headlights wont work

Double check I'll bet it is not getting spark, So something is off. Last time serviced? any recent repairs? Sounds like valve timing belt was not installed correctly.

Replace the turn signal switch. All the exterior lights except the high mount brake light run thru it.

ok if you run a power wire to the positive on battery does it go?
if so its a plug or cable issue. if not make an earth wire for the earth side of light and try the power again. if it goes you have a bad earth.

brake and turn are the same filament in the bulb. Try a new bulb. if that doesn't work your going to chase a short/ground on that wire back to the switch. get a wiring diagram to help.

yes there is a relay in the fuse panel

start with a switch, then trace the wiring. It could have a short.

try checking the daytime running light module.
there is also a sensor for the auto headlights that may think it is still daylight.try playing around with the auto switch

The sound system was causing to much of an unpredictable power usage on the headlights and the fuse has blown as a safety precaution.

I have simmilyer problem. have a 1987 ford escort stationwagon high beams only but have to hold the bright lever on at all times. Otherwise my lights don't work at all except the parking lights. Have you found your problem that might help me.

My friends did the same thing, apparently there is a bimetlalic strip
in the headlight switch, the temperature must be up for the headlights to work. I do not know the rational behind this.
So need a new headlight switch (his is on the signal light arm), of
find a way to bypass the temperature sensor (bimetallic strip)