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2018 Wrangler JL 5-Way Trailer Wiring Harness

Question:

I need a 5 pin flat connector to supply power to my boat trailer surge brakes solenoid do you offer anything for this application ?

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Expert Reply:

We certainly do. The solution is basically to convert a 4-way to a 5-way.

If your 2018 Jeep JL already has a 4-way, then you simply need to convert it. If it doesn't already have any trailer wiring, then you need to start with a custom 4-way harness. The Tekonsha, part # 118786, has the highest maximum amperage available for the wiring that fits your Jeep so it's what I'd choose. It plugs inline behind both taillights and then has a hot lead that's run to the Jeep's battery. I've linked the install details as well as a help article about running the power wire for you.

Once you've got a working 4-way, whether you added it or it's a factory harness, you just convert it using part # 47515. It plugs into the 4-way you added or the lighting functions and has an additional wire you splice into the Jeep's reverse light circuit. The reverse light circuit is what your trailer's electric lock out uses to prevent the surge brakes from locking up when you're in reverse.

You'll need to find the correct wire to tap into on the Jeep using a circuit tester like part # PTW2993.

expert reply by:
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Charles S

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