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HELP!!! JL Hitch Receiver Wiring Harness not working after install.

Dubeau9005

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First Name
Keith
Joined
Feb 26, 2018
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Ottawa
Vehicle(s)
2018 Jeep Wrangler JLU Sport S, 2010 GMC Sierra 1500
Sorry if this is a dumb question but did you have the trailer connected to the hitch when you tested? My trailer lights will not work unless the trailer is actually connected to the hitch. Something to do with the grounding.
Actually? I’ve never heard or seen that before. Have you tested this with another trailer? One of the wires is a ground wire. Sounds like you may have a broken ground wire on the trailer possibly.
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