Brake Wire Backfeeding to Light on 7-Way
Updated 04/10/2023 | Published 04/07/2023
Question:
Typical 7 pin trailer wiring, no electric brakes or aux power. Good ground. One light for turn signal and brake on each side. I connect the ground and running lights to their designated wire on the light. But when I combine the brake and turn signal wires together and attach to the last wire for the right light the left light turns on. I found out there is current back feeding through the brake wire to the left light. What am I doing wrong ?
asked by: Dan R
Expert Reply:
It doesn't sound like you are doing anything wrong from what I can tell. Based on how you are describing it with the backfeed, a diode may be the solution on that brake wire to help isolate the power. For that use the Roadmaster Single Park Light Diode # RM-690.
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Roadmaster Single Park Light Diode
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- Flat Tow Wiring Harness
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