Light question

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EARL KITCHENS

Member
Jul 3, 2015
33
9
8
Truck Year
2015
My Laramie came with a 7 connector round plug for towing. My boat trailer has a 5 pin flat plug. I bought an adapter to go from a seven pin to a five pin. My boat trailer running lights work but the signals and brake lights do not. Any suggestions? Thanks.
 

Brady

Well-Known Member
Jun 7, 2015
991
392
63
OHIO
Truck Year
2015
Did you try going directly to the 5 pin that is the top part of the trucks receptacle? Or does yours only have the 7pin?
 

EARL KITCHENS

Member
Jul 3, 2015
33
9
8
Truck Year
2015
ZMAN079, I have an adapter just like the one you showed. I have actually purchased two different ones and got the same results. i think the factory wiring to the round 7 pin is hooked up wrong.
 

Brady

Well-Known Member
Jun 7, 2015
991
392
63
OHIO
Truck Year
2015
Test light is in order.
 

EARL KITCHENS

Member
Jul 3, 2015
33
9
8
Truck Year
2015
i will take that bet. The lights work fine hooked up to my old GMC Sierra. They also work with two other vehicles. I think the truck wiring from the factory is the issue. i will know by next week. Thanks
 
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WesMgc

Active Member
Aug 18, 2015
128
33
28
Ontario ,Canada
Truck Year
2014
i will take that bet. The lights work fine hooked up to my old GMC Sierra. They also work with two other vehicles. I think the truck wiring from the factory is the issue. i will know by next week. Thanks
There is a 7 pin tester that you just plug in and lights up if all is good.
Hope you get it fixed.
 
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