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Is Blue Wire of Trailer Wiring Normally the Brake Output Circuit  

Updated 05/12/2025 | Published 05/06/2025

Question:

I found in my junction box that the blue wire is taped and the red is conected to bring power to electric brakes and the trailer has blue wires for electric brakes is this normal o is it personaliced modification??

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Expert Reply:

Hay Gaspar, the blue wire running to the brake output circuit is normal so in that regard it's standard. But the other colors you mentioned do not appear to be standard so I would run the wires by the correct function to the wiring of your trailer instead.

expert reply by:
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Jameson C
Gaspar G. profile picture

Gaspar G.

5/9/2025

Tank you bery much!!

Jameson C. profile picture
Etrailer Expert

Jameson C.

5/12/2025

@GasparG Glad to help!

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