I have a tow kit but I forgot to ask about the factory brake controls, turns out it's a late 2021 add on and it will cost around $300 after sale no matter what it costs to install. However, under the driver's side there is a wiring harness for the brake controls, just above where the clutch pedal should be (if you have an automatic). Brake control wiring adapter into it, then what brake control you want. There are several videos online showing where this is. It has enough wiring to run almost anywhere under the dash. I didn't want to screw my new jeep in there, it just sticks out from under the steering column. So the Tekonsha 3073-P Brake Control Harness Adapter is exactly what you need to add brake control to your 2021 JT Gladiator.
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