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International Automotive Technicians Network
Re: Turn Signals and Brake lights
Posted to HD/Fleet Forum on 1/13/2018 2 Replies

If I understand you you tried to fix the truck lights with the trailer light wiring. You can not do that they are two different systems. The truck is a four wire system and the trailer is a five wire system. The truck lights the brake and turn signal they shar... Login to read more.

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