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Trailer Wiring Connections Solution for Semi Truck Towing RV Style Trailer  

Question:

Will this box fix the brake light problem. I have semi truck has its own red and black wire for brake lights only. Wireing up to a utility trailer I hook them up brake lights do work but when I check the turn signals left turn signal both lights flash. Do I have to install a separate female 7 way plug with a brake air switch.

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Expert Reply:

I am not aware of any adapter on the recreational towing market that will convert a semi truck connector to an RV style connector, but we do carry the necessary parts to equip your tractor to tow a fifth wheel trailer using the following parts:

-Tail light converter # 119250KIT - to combine the tail light circuits on the semi truck.
-Universal 4-way to 7-way Installation Kit # ETBC7 - to give your truck a 7-way RV style trailer connector. This kit also includes all hardware necessary to install a brake controller.
-Prodigy P3 Brake Controller # 90195 - to actuate electric trailer brakes.
*You may also need additional amounts of 16 gauge ( # 16-4B-1) and 12 gauge ( # 12-1-1) wire to complete the installation.

expert reply by:
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Jameson C
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Instructions for 90195Instructions for ETBC7Instructions for 119250KIT
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