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Troubleshooting Left Turn Trailer Blinker that Doesn't Work  

Published 08/19/2016

Question:

My left side blinkers is not working main causes for this and colors for wiring please thank you

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Expert Reply:

Main cause for trailer taillights not working is a bad ground. Nearly every trailer wiring problem comes down to a ground not being clean or sufficient. Try improving the grounds of the assembly and the trailer and the trailer light should start working again.

Typically the left turn blinker uses a yellow colored wire but not all trailers are wired with the industry standard colors.

I attached a couple help articles for you to check out as well.

expert reply by:
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Jameson C

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