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How To Install The Roadmaster Brake-Lite Relay Kit On A 2022 Jeep Wrangler Limited Sport


It seems the 2022 Jeep Wrangler Limited Sport does not have a traditional brake light switch, how is this being installed?


Expert Reply:

To install the Roadmaster Brake-Lite Relay Kit for Towed Vehicles # RM-88400 on your 2022 Jeep Wrangler Limited Sport, you will start by:

1. Start by confirming that you have the right wire, you 'll want to confirm this by using a multimeter like # PT29ZR to check the wire only has 12 volts when the brakes are pressed.

2. Then you'll continue by removing the vehicle's brake light fuse located in the fuse panel.

3. Continue by cutting the brake light wire a few inches down from the cold side of the brake light switch.

4. Using the included blue butt connector, connect the black wire from the Brake-Lite relay to the other end of the brake light wire.

5. Then, you'll want to attach this wire and the brake monitor wire from the supplemental braking system to the brake signal output.

6. Next, you'll want to identify a fuse that is only powered when the ignition key is in the RUN position, and OFF when in the TOW position, then pull that fuse.

Be sure that the certain fuse you choose is not apart of the "retained accessory power circuit"

7. Continue by inserting the fuse you just pulled into the slot closest to the fuse blades, then insert a fuse tap into the empty slot in the fuse panel .

8. With the blue butt connector, connect the red wire from the Brake-Lite Relay to the wire from the fuse tap.

9. With the attached ring terminal and included 5/16" self tapping screw, connect the white wire from the Brake-Lite
Relay to a good chassis ground. To avoid grounding problems, you'll want to attach the wire directly to the frame.

10. To finish, you'll want to secure the Brake-Lite in place using the included wire ties, re-insert the removed fuse mentioned in step 2, and insert the provided 10 amp fuse into the fuse tap.

I have included an installation video on a 2017 Jeep Wrangler Unlimited for you to check out as well.

Roadmaster Brake-Lite Relay Wiring Schematic
Roadmaster Brake-Lite Relay Wiring Schematic
(click to enlarge)
expert reply by:
Bryce D

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