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Why Won't Hopkins Magnetic Tow Lights Work with Semi Truck Trailer Wiring


brake lights not working properly on semi tractor application all others work fine these are vulcan wireless with 7 hole plug lights new I am a driveaway driver multiple vehicle application?


Expert Reply:

The issue is that semi trucks have the stop lights separate from the turn signals and standard trailer wiring like what the Hopkins Magnetic Tow Lights part # C6304 has these two circuits are on the same wire. So you'd have to wire in a signal converter like the Roadmaster # RM-732 so that the two circuits would be on same wire.

expert reply by:
Jameson C

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