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Troubleshooting Trailer Wiring Where Turn and Brake Signals Stop Working  

Question:

plug in on truck no power for turn or brakes got no power to 7 or 4way check plug why no power check fuses all seem ok

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Expert Reply:

Most likely what you have going on are dirty pins on your trailer wiring connectors. This is almost always the issue when trailer lighting functions stop working. It can be on the ground circuit which affects all functions or on individual pins which then affects individual circuits. Take some sandpaper to the pins of the connectors and you should see them start to work again.

I also attached a help article on trailer lighting troubleshooting as well.

expert reply by:
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Jameson C

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