Recommended Flat Tow Wiring Kit For A 2019 Jeep Grand Cherokee

Question:

I had planned on using the RM-154 and RM-88400 but I am reconsidering primarily because I am hesitant to possibly void my warranty on 2019 Jeep Grand Cherokee Overland. I am looking for a wiring system similar to RM-152-LED, because this one is not confirmed to fit. I also have purchased SM99251 and would need something to disable the brake light signal and rely solely on the RV lighting. Thanks

asked by: Josh

Expert Reply:

The 2019 Jeep Grand Cherokee is not compatible with bulb and socket kits from Roadmaster like the # RM-152-LED that you referenced. Bulb and socket kits will actually cause much more harm since you'd have to drill into the tail light housing and run the risk of damaging the light and will typically also face issues with water leaking into the taillight through the hole the bulb and socket kit uses.

You'd be much better off just using a splice in kit like the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 so that you have the option to run a charge line # RM-156-25 to keep the battery charged while you tow. Splice in diode wiring can seem scary to do but it's honestly so easy a caveman could do it, so you don't need to worry about voiding any warranties.

The RM-154 is a great option too but there's no room to expand if you needed to run anything else so a 6-pole to 7-pole is the best option.

As for the relay, the brake light switch wire on your Jeep isn't usable so you'll actually skip the # RM-88400 and install the Stop Light Switch Kit # RM-751449 in its place to wire the indicator light from the Demco SBS Stay-IN-Play DUO # SM99251 to.

You wouldn't be disabling the brake light signal and relying solely on the RV lighting because then you wouldn't know if the system was actually working and dperessing the brake pedal as it should.