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These are all different circuits. The brake lights are on a 10amp fuse - the headlights are on a 50amp fuse - and the parking and dash lights are on a 20amp fuse. Do you have power going into the headlight switch and the brake light switch ?
The first thing to check is if any fuses are blown. If all fuses look good, check the bulbs, if those look good, check to be sure there is power going to the headlights. If not, there is likely a wiring issue.
it does happen that the bulbs burn out and you never noticed the first one burn out so check for power to the bulbs and then check the fuses the head lights are on a different fuse then the parking lights
Well I don't see a fuse or fuseable link for the headlight circuit. In years past there was a circuit breaker built into the headlight switch for the headlights and fuses for everything else. I would check the red wire on the switch for power first. It could also be a problem with the dimmer switch.
I don't think Ford used a fuse for the headlights. There is usually a circuit breaker in the headlight switch. I would check for power at the dimmer switch in each position.
you don`t say if you have checked the fuses for the headlights.if the fuses are okay and you know that the low beam filaments are working.you may have to feed power and ground directly to the proper headlight prongs from the battery to make sure the bulbs are good.then it could be a relay for the low beams or a switch for the headlights.you don`t say if you have daytime running lights on this car as there is a module for this system that may be the problem for the now low beams.
I would check the headlight switch. It could be that you are able to turn the running lights on but the headlight position is not working. Using a test light check for power at both sides of the fuse. When using a test light do not just check all fuses as you do not want to use a test light on the air bag fuse(s). If there is no power on both sides of the fuse (and you already check that the fuse is good) then there is a problem somewhere in the electrical. If there is power at both sides, then the next area to check would be the headlight switch. If the vehicle has fog lamps, turn them on then turn the headlights on. The fog lights should come on. If not then you can almost guarantee it's in the switch as it controls both the fog lights and headlights. Pull back on your turn signal switch (or push it forward) to see if the high beems come on. If they do not but the fog lights go out, then it's highly probable that the headlight switch is bad.
Assuming you've already ruled out that the bulb is fine, get a test light and verify there is power (make sure headlights on when doing this). If there's no power check headlight fuses with test light. If fuses check out okay, there may be a break in the wire between the fusebox and headlamp, follow the wire and check it for damages...
When I don't have access to a test light, i use any 12v car light and hook it up, but if you have to do this make sure the makeshift test light is fused or you could destroy it. Yes power should be 12 Volts DC.
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