Troubleshooting 7-Way to Semi 7-Way Adapter Stoplights Not Working
Updated 11/14/2024 | Published 07/27/2023
Question:
I bought the 7 pin adapter to go from 7 pin round on my semi to the 7 pin flat . Everything works except the brake lights. I havent hooked up a brake controller yet . Is that needed to make the brake lights work . Thanks for any help .
asked by: Lee
Expert Reply:
The problem you most likely are experiencing is due to fact that semi trucks have the turn signals and stoplight circuit on separate circuits/wires. Standard trailer wiring has the stoplight and turn signal circuits on the same wire.
So in your situation you would need to wire in the Hopkins Tail Light Converter part # HM48847 on just the stoplight and turn signal circuits and you'll be good.
A brake controller would not affect the stoplight circuit at all.
Product Page this Question was Asked From
Pollak Heavy-Duty, 7-Pole, Round Pin, Trailer Wiring Connector - Trailer End
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 7 Round
- Plug Only
- Pollak
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Dwaldo
11/14/2024
if I put the converter on will the trailer lights still work when I plug it into my pick up