My 1986 Ford F150 XLT Lariat (no supercab) has no parking lights and the dimmer is out on the cluster. The headlights turn signals and brake lights work. I tried replacing the headlight switch but that was ok. All fuses are also good in the fusebox. It looks like another wonderful Ford unsolved mystery. Maybe you can help. You said you have a 1986 f150 electrical wiring diagram that you can share? It would be much appreciated.
Could someone please email the wiring diagram for a 1990 f150? Mine I have brake lights reverse lights and signal but no park lights some of the same problems as rusty have no bad fuses and replaced light switch still no luck email is email@example.com thanks
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Power for the instrument cluster passes through fuse 6 in the battery junction box and is applied to the main light switch. When that switch is set to park, 12V power passes through 5A fuse 18 in the central junction box and is applied to the dimmer module which is part of the main light switch. The dimmer output goes to the instrument cluster as well as a bunch of other stuff. If you have to troubleshoot, just work your way through the circuit as I described it, checking fuses etc. until you find the problem.
Had a problem like this before and it was the computer..But you could faintly smell something like burnt wires..The computer should be down by the kick panel on the driverside..See if you smell anything on that side
There is a small voltage regulator in side the dash that controls the gages its on the back of the instrument panal over the speedometer you need to remove the panal to get is it conects almost like a 9 volt battery that the conector likes like but its a lot smaller in side
Well first have you charged your battery back up, if so then try to by pass the ingintion switch by just connecting the two main post of the colenoid with a piece or wire, this creates a direct wire basically from your battery to your starter, if still no luck you will need a new starter located more to the drivers side close to right under the pedels on the bottom side of the truck.