Question about 2005 Ford F 250 Super Duty

2 Answers

2005 Ford F 250 Trailer signal and Brake lights not working on the right side of the trailer. Left side works great. The Truck lights work great as well. I have switched the fuses for the right and left tow signals with the same results therefore it is not a fuse issue. What could be causing this?

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  • pgunderson Sep 08, 2009

    The trailer works fine on another truck so the problem is in the truck somewhere.

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With PLUG CONNECTORS all in GOOD Condition, I Would Be Sure Of OUTPUT From Both Sorces AT TRUCK OUTPUT PLUG If No Power there>> Isolated at TRUCK<< If POWER is Present Going INTO Trailer Try a TEMPORARY GROUND at each Bulb .

This Sounds like A Problem that Would ORIGINATE at teh > TRUCK /TRAILER CONNECTOR

Posted on Sep 07, 2009

  • Ronnie Wilson Sep 08, 2009

    Serch for GROUND Connections and there Integraty

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Check the light mounts on the trailer's right side. It sounds like the ground is not connected on that side or the light bulb socket is broken or loose. A bad groundis usually caused by either a broken wire or rust under where the light is mounted. If there is rust, clean with a wire wheel then remount the light and test.

If the bulb socket is cracked or loose to the touch, replace the light mount but clean the mounting area as above.

Posted on Sep 07, 2009

  • bulldogchief
    bulldogchief Sep 08, 2009

    I agree with rejakwilson...did nto see his response when I posted mine...check the individual outputs at the plug at the back of the truck...if it is there, the problem is in the trailer, if not, the problem is in the truck.

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