what happened???
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Senior User
Joined: Mar 2011
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From: ohio
what happened???
I have a regular cab long bed 2003 Ford F-250 4x4 with a 5.4 and a 6sp manual. All of a sudden today I don't have brake lights. I get power at the brake switch, so I moved to the back or the truck. At the harness where it splits out for the trailer harness I don't have anything for the brake lights, but at the other connector that looks like it is for the tail lights and backup lights ect. I get power. But when I pulled out the tail lights and tested there I don't have any power.
Clear as mud???
I don't understand why I can only get a feed from one of the three different places I checked on the rear end. Is there a common place that I am not seeing that gets pinched or lots of corrosion?
Thanks,
Robert
Clear as mud???
I don't understand why I can only get a feed from one of the three different places I checked on the rear end. Is there a common place that I am not seeing that gets pinched or lots of corrosion?
Thanks,
Robert
Cargo Master
Joined: Jul 2011
Posts: 2,000
Likes: 4
From: Nowthen, MN
Maybe a problem with the trailer connector? I believe you can completely disconnect the trailer harness and plug the tail light harness directly into the harness that comes from the front of the truck. See if that fixes the problem.
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From: ohio
Also My brake controller (for trailer brakes) works fine if that makes any difference...
I seem to be getting power through the brake switch as well. I also tried a known good spare brake switch that I have laying around with no change.
I checked the the electrical connections that are right in front of the gas tank along the frame rail and they seemed really good w/ no corrosion. Keep the ideas coming!!!
thanks,
Robert
Cargo Master
Joined: Jul 2011
Posts: 2,000
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From: Nowthen, MN
Ok after looking at mine I see what you are saying. These don't have a connector for the trailer lights, it comes right out of the main harness.
The only connector I see is on a harness that has a tag on it that says Center High Mount Stop Lamp. Does your 3rd brake light work?
The only connector I see is on a harness that has a tag on it that says Center High Mount Stop Lamp. Does your 3rd brake light work?
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From: ohio
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From: ohio
yes, everything works in the rear except for the brake lights (i have markers, turns, markers and turns, and back up lights).
Now today I noticed that the drivers front 4 way (hazard light) doesn't blink but I have front marker lights and normal turn signals.
Now today I noticed that the drivers front 4 way (hazard light) doesn't blink but I have front marker lights and normal turn signals.
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Joined: Sep 2007
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From: Scio, OR
The brake and turn signals at the rear use the same wires and bulbs. So it the turn signals are working, the wires and lights are working and the problem is not anywhere rearward.
The most likely problem is the multi-function switch. I do not believe it is terribly expensive nor difficult to replace.
The most likely problem is the multi-function switch. I do not believe it is terribly expensive nor difficult to replace.