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Does Trailer Wiring for 2018 Jeep Wrangler JL Unlimited Have to Run to Battery Post

Question:

Can I use the power to the 12 DC outlet in the read compartment as a power source for this application.

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Expert Reply:

Not all vehicles can handle the additional amperage draw of the trailer taillights on the vehicle taillight circuits. Those vehicles need setup that draws power from the battery. Some vehicles have higher rated circuits that can handle this, and others need to have the power drawn straight from the battery to protect the taillight circuits.

For your 2018 Jeep Wrangler Unlimited JL you need to install a harness that draws power from the battery to protect the taillight circuits. For that you would need the part # 118786 like you referenced. If you were to run the power wire to a power outlet on the vehicle you'd void the warranty and also bypass the circuit protection of the harness which potentially would cause damage to the vehicle in the event of a short. I also attached a help article on running the power wire for you to check out as well.

expert reply by:
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Jameson C

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