Bad relay? Blown fuse in power distribution block? Bad bulbs?
check the fudes check headlights for power then check light switch
have you replaced the dimmer switch? if not that may be the problem. I had the same problem in reverse( brights worked but headlights didn't) water damaged the dimmer switch on the steering column once I replaced it all was good.
Are both lights out at the same time. Have you changed the bulbs and if you have they still dont work there is a relay and or fse for them in the fuse box. Check the fuse and see if it blown and check the relay and see if it clicks when you turn the lights on. If it dont click you might also have a bad switch for the lights
one of two things, BAD EARTH, or Relay switch.
all my light work,changed my break light switch still dont have break lighs,i have good grounds
I dont know because i dont have a FORD Check your brake light switch on the back of your brake pedal for adjustment.
It sounds like the low beam/high beam switch is bad. Fuses are not the problem since they are built into the headlight switch and would cause headlights to blink or not come on for both high and low beam headlights.
none, snakes dont have armpits
Check the bulbs & fuses first. Then if o/k start looking for electrical problems such as switch, wiring & sockets
The multifunction switch that allows you to turn you headlights is broken. The only way to find out is to replace it or take it to a mechanic.
I dont think that the 1990 4Runner had daytime running lights so you would have to turn them on yourself. Otherwise the headlights each have their own fuse and a relay in the engine compartment, if these are not bad then it may be the switch.
you dont