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  1. #1
    Setting Up Camp Gypsyliving's Avatar
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    Trailer left brake light is always on when tow vehicle lights are on.

    I have less than 1 year old 2016 30BH GD Reflextion 5th wheel. On long road trip from NC to AZ. Lights worked fine leaving home, but after first stop issue raised. Lights work perfectly when tow vehicle's lights are off. Removed both tail lights and re crimped all connections. Replaced bulb. Removed bulb. No change. Turn signals and all marker lights work. Called service dept of selling dealer and tried their suggestions. Have call out to GD service dept. Wondering if adding additional ground to left taillight would fix issue. Any ideas?


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  2. #2
    King Pin
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    That is a very unusual issue. My guess is that the left taillight is defective. When you have the tow vehicle lights on, you appear to be getting voltage to the filament for the left brake light.

    Jim

  3. #3
    Setting Up Camp Gypsyliving's Avatar
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    Correct Jim. Thought it was a bad ground, but if I apply a ground I short everything out. The wiring to the two filaments must be backwards, but now to figure out which one.


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  4. #4
    Left The Driveway
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    What happens to the left tail light when you apply the brake?

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  5. #5
    Setting Up Camp Gypsyliving's Avatar
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    Quote Originally Posted by gglos1107 View Post
    What happens to the left tail light when you apply the brake?

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    Nothing brake light was continuously on when tow vehicle lights are on thus I figured out that the black and green wires to the bulb were reversed. I cut them and switched them and now everything works as it should. Took me a while but the dealer service Dept was very helpful in helping diagnose it on the road so I could get it right.


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