How to Determine Function of Trailer Wiring
Updated 06/15/2022 | Published 06/14/2022
Question:
I bought a 7 way junction box and connector. Unfortunately my truck are not SAE white, black, red, green, yellow, brown and blue How do I test what’s hot and ground? I have 2 blacks and one red. The others are multicolored.
asked by: Todd M
0
Expert Reply:
The only way to determine the functions of trailer wiring is to use a circuit tester and test each wire; the easiest to use is the Cordless Circuit Tester # PTW2979.
expert reply by:
Kyle S
0
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