Installing the RoadMaster Transmitter # RM-9420 for Even Brake on a 2017 Ford F-150

Published 07/19/2018

Products Featured in This Question

Hook Probe Circuit Tester

(67)

$14.32

Roadmaster Battery Charge Line Kit for Towed Vehicles

(1415)

$50.56

Roadmaster Battery Charge Line Kit for Motorhomes

(151)

$58.90

12 Volt Outlet Kit, 20 amps

(395)

$44.26

Question:

The pin 1 need to be hot when brake pedal pressed on my f150 2017 but the problem is i need to put the ignition in position 1 because to much power loss in position 2 and in this position no more power to this pin Also after 20 min the truck cut the power on the cigarette lighter so dud i need to plug one directly to the battery? Did i need tu install a charging power to not drain the truck battery?

asked by: Rick

Helpful Expert Reply:

If you use a circuit tester like part # PTW2993 you should be able to locate some wires behind or around your brake pedal and test them. If one gets hot only when your brake pedal is pressed, then you can connect the RoadMaster Transmitter # RM-9420 to that.

Otherwise, your best bet would be to locate the trailer brake controller connector and tap into the stop light switch that way. If you check up under your dash to the right of the steering wheel (basically behind that center panel) you will find the factory brake controller connector. You can then use a circuit tester to see which of those 4 wires is the stop light switch and tap into it there. I have attached a video of the Primus IQ # TK90160 being installed on a 2017 Ford F-150 that you can reference for this.

If you don't have a circuit tester, then you can simply look at the pin-out configuration of the connector to determine which wire you need to tap into. Attached is a picture of the connector for the Plug-In Adapter # 22292 for your F-150. The red wire on this connector is for the stop light switch. All you need to do is see which wire is on the opposite side for your factory brake controller connector and you know which one to tap into!

expert reply by: Jon G

click to enlarge

Rick

7/19/2018

Jon G.

7/19/2018

If you are experiencing power loss while flat towing your F-150 with the Roadmaster Even Brake installed then I do have a few solutions for you. Since the cigarette lighter stops sending power after 20 minutes you will need to install the 12 Volt Outlet Kit # RM-9332 and connect it directly to your battery. This will bypass any internal wiring on your F-150 and keep your Even Brake powered up. To help keep your battery from draining you can install the Charge Line Kit # RM-156-25 on your F-150 and connect it to the pin that sends 12V Power from your motorhome. If your motorhome doesn't have a pin dedicated to this then you can install the Charge Line Kit # RM-156-75 on it. I'm not 100% sure what you meant by the pins and positions but installing these items will enable you to keep the Even Brake powered up and your battery from draining.