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Troubleshooting Brake Lights that Activate When Running Lights Come On

Question:

Why is brake lights already lit up when lights are on at nihht and in the day with lights out the brake light work when applied

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Expert Reply:

You have a short between the running light and stop/turn circuits of your trailer wiring (if issue is on trailer, if on vehicle then it's the vehicle wiring with a short). You'd need to go over the wiring of the circuits to see where the short is and fix as needed.

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Jameson C

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