Why Would Stoplights Not Function With 7-Way Round Trailer Wiring Setup
Published 08/16/2021
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Question:
Hello, All of our fleet trucks are wired for 7 round, so Im going about standardizing all of our trailers to be the same. I have purchased the Pollak 11702 https://www.etrailer.com/Wiring/Pollak/PK11702.html. Which functions go in which locations on the plug? Trailers are wired: White: Ground Black: Clearance/Taillights Yellow: L Turn/Brake Light Green: R Turn/Brake Light Red: Aux Brown: Electric Brakes Im having issues with the brake lights not working.
asked by: Zack M
Expert Reply:
A common issue with the 7-way round connectors is that sometimes the brake light circuit is isolated from the turn signals. My guess is that your tow vehicle has a stoplight circuit dedicated on it's trailer wiring and your trailer has standard trailer taillight circuits where the two are combined.
Probably the easiest solution would be to wire in a 3-2 converter on the tow vehicle wiring so that you can get the circuits combined and your trailer taillights will function properly like with the part # RM-732.
Product Page this Question was Asked From
Pollak HD, 7-Pole Round Pin Connector w/Cable Guard
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 7 Round
- Plug Only
- Pollak
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