Question about 1997 Ford Explorer AWD

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97 Explorer AWD Brake lights not working and auto door locks

When i put car in drive let go of brake auto door locks, lock the brake lights work. When the auto locks dont work I dnt have lower brake lights
I did have top brake light for a while not the lower2, changed brake switch, lower bulbs not it.For a while i would drive then the auto locks would lock then i would have brake lights. I now have no top or bottom brake lights and I have always had running lights. Small relay box right next to battery clicks when brake applied anything related?

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Try spraying the brake light switch with WD-40 first. If that doesn't fix the situation, then:

Remove the under-dash panel. Locate the switch near the top of the brake pedal and disconnect the wiring harness. Remove the switch retaining pin and the white nylon washer from the brake pedal pin, then slide the brake light switch and pushrod off far enough for the outer hole of the switch to clear the pin. Slide the switch down to remove it.
The switch located on the brake pedal has stopped working. Look at the top of the arm that the brake pedal is attached to above where it pivots. A simple push button about the size of your thumb with 2 wires is towards the upper part of peddle. It is on the side facing away from the firewall. A 1/2" diameter tube extends from it to the firewall.
If it has a mechanical switch, it will be located somewhere on the brake lever. If it has a pressure switch, it is located near or on the master cylinder.

Now please check power and ground to the bulb sockets. Since the high mount brake light is working you probably don't have a problem with the switch on the brake pedal. What is left is the wires and plug blocks between the brake pedal switch and the brake lights. They might be getting power but not ground or ground but not power, but they are not getting both or they would be coming on. Start back at the brake light sockets and trace the wires up. You might have a plug block up underneath the rear end of the truck. Brake lights have power even when shut off, so do it that way with the truck in park so someone doesn't get run over or overcome by exhaust fumes or burnt on a hot exhaust pipe. If moving the block gives you an intermittent connection you found the problem. The only other thing is that something might be shorted in the block that lets you plug a trailer in but that would blow a fuse.

Please do accept this solution and revert for further assistance.


Posted on Jun 20, 2009


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