Super Duty & Heavy Duty1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines
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I have an 04 F250 with no brake lights. However the third brake light works. Ive also noticed that my trailer brake lights dont work either. I do
have all my turn signals and running lights. Another issue that could be connected is I have one out of four hazard lights. when i push in the hazards my front passenger blinker works but none of the others. Could this all be due to a relay switch? Any ideas would be appreciated.
its a gas v8 and Ive checked the fuses that I believe would have been the issue. all are good. Ive also looked under the hood on the drivers side and found to black boxes with relays in both and have pulled them out and looked them over. no corrosion, however Im not 100% sure they are what Im supposed to be looking for. I dont think they had 12 pins. The multifunction switch Im assuming is in the steering column?? If so Ill have to look into that. thanks
No brake lights. Problem solved. 2006 F250 Super Duty. My symptoms started when my truck was fairly new. I had an intermittent warning, TBC FAULT. After 115,000 miles I noticed that sometimes it was hard to get the shifter out of Park once in a while. Then the TBC Fault warning came on almost every time I hit the brakes. Somebody told me I didn't have brake lights including the third light. My flashers and turn signals worked correctly. I saw a goofy guy on You tube playing with his brake light switch located just above the brake pedal. Like him, when I physically turned the switch my brake lights came on. To remove the switch you remove a green safety cover from a clip, remove the clip, slide switch and pedal arm off and disconnect the harness. The only tool used was a small flat screwdriver. My part #F87Z-13480-AA cost just under $30 at the dealership.
hey test the 2 wires closest to the firewall on your brake pedal position switch, one should be constant and the other should get power when you hit the pedal, if you are not getting power at all i would venture a guess its the module its getting and sending power i would move up to the multifunction switch
Thanks Will. I guess I didn't specify that replacing the brake switch fixed my problems. I took the old switch apart, there were three separate contacts. Obviously one is for the brake lights, another must activate the release for the shifter.
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