Question about 2008 Ford F-350

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I have a 2008 Dodge Ram that came with the tow package. When I plug in my 7-pin trailer (with electric brakes) everything works fine until I turn on the truck lights. When I turn on the truck lights, I loose both of my turn signals and brake lights on the trailer. The running lights stay on. I unplugged the brake controller and still have the same problem. I compared my trailer plug diagram to my trucks manual and everything appears to be wired correctly.

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  • Ford Master
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If you have amber signal lights & red brake lights, it's 2 separate circuits. You'll need to buy a small converter that you wire into harness to correct that. Not expensive, try autoparts store or RV/trailer sales, should have them.

Posted on May 08, 2009

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