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Troubleshoot problem with running lights??

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The most common cause of failure is the 7 pin plug and connector between the truck and trailer. Check the contacts on each for bent connectors or corrosion. (I've been able to resurrect a trailer connector in the past by gently bending a prong back into place with a flathead screwdriver, but with a trailer so new yours shouldn't be that worn.) CAUTION: Pin 4 on both truck and trailer may be "hot" (connected to the battery) at all times in some installations, so don't short that one out.


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Stephanie and Dudley from CT.  2022 LE2, Hull #1150: Eggcelsior.

Tow vehicle: 2016 GMC Sierra 6.0 gas dually 4x4.

Our Oliver journey: Steph and Dud B's RV Screed

Where we've been RVing since 1999:


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A "Q-tip" to help clean things out and then some dielectric grease - you can put that in the trailer plug with another "Q-tip".

Past that - check your fuses.


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2023 Ford F150 Lariat 3.5EB FX4 Max Towing, Max Payload, 2016 Oliver Elite II - Hull #117 "Twist"

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