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no brake lights?? help

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Old 02-05-2011, 12:00 PM
piedpipper5 piedpipper5 is offline
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no brake lights?? help

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.
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Old 02-05-2011, 05:01 PM
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wow im surprised that there are no suggestions! Never had that happen on a forum
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Old 02-05-2011, 05:07 PM
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Be patient. It's the weekend and a lot of folks are out doing things besides hanging out here. I'm sure someone will chime in here shortly to help you out.

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Old 02-05-2011, 06:38 PM
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I would say multi function switch (turn signal assembly) . There is a procedure to check it in my photos. Click below
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Rear brake lights go through multifunction switch. 3rd brake light comes off a direct splice from switch on pedal.



U did not say if gas or diesel.....With third brake light working and if multifunction switch is ok, I would check the following connectors.

If diesel, under the aux relay box under hood is a round 8 pin connector. There are 2 that look really similar...Check this for corrosion.

If gas, its basically in the same place but square with 12 pins. The splice for the trailer lights is after this connection so its the 1st place to look for problems going by your description imho.
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Old 02-05-2011, 10:19 PM
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Did you check the fuses?
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Old 02-06-2011, 05:10 AM
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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
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Old 02-06-2011, 06:16 AM
projectSHO89 projectSHO89 is offline
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Posting electrical problems in the electrical section would get you the fastest help since folks tend to hang out where their interests are highest.

Multi-function switch or it wiring connectors.

Pull the column shrouds and inspect.
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Old 08-03-2014, 12:40 PM
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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.
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Old 08-05-2014, 06:58 PM
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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
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Old 08-06-2014, 06:17 PM
rich1zoom rich1zoom is offline
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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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Old 03-02-2015, 10:34 PM
keg0177 keg0177 is offline
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I've had this same "TBC Fault" for a while and it doesn't allow my signals nor brake lights to function. I've checked fuses and the trailer plug and I have yet to find any clear reason, other than get a new one. Has anyone found a way to bypass the TBC to allow functionality of signal lights and brakes lights?
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Old 03-03-2015, 05:12 AM
rich1zoom rich1zoom is offline
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Keg)177. Did you try the brake light switch located under the dash on the brake pedal arm ? That solved all my issues.
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Old 03-03-2015, 06:03 AM
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Here is the wiring charts...hope it helps


Click the image to open in full size.


2004 Exterior Lights 1


Click the image to open in full size.


2004 Exterior Lights 2
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Old 03-03-2015, 07:42 AM
projectSHO89 projectSHO89 is offline
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Quote:
Originally Posted by keg0177 View Post
I've had this same "TBC Fault" for a while and it doesn't allow my signals nor brake lights to function. I've checked fuses and the trailer plug and I have yet to find any clear reason, other than get a new one. Has anyone found a way to bypass the TBC to allow functionality of signal lights and brakes lights?
The TBC isn't causing your problem. Your problem is a lack of brake lights. If you haven't checked the switch and its circuit yet, you're wasting everyone's time, including your own.
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Old 03-03-2015, 01:38 PM
keg0177 keg0177 is offline
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Rish1zoom, I did try that according to info I saw hear. I grabbed it directly and toggled it back and forth but it didn't actuate the brake lights at all
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Old 03-03-2015, 01:38 PM
 
 
 
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