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  1. Flat Tow Brake System
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RoadMaster Stop Light Switch Kit
Roadmaster

RoadMaster Stop Light Switch Kit

Part Number: RM89ZR
In Stock
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$50.15
Retail:$64.09
You Save: 22%
Flat Tow Brake System
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Avoid damage to your vehicle by ensuring that your supplemental braking system is properly positioned and working effectively. Kit activates your RV monitoring system to alert you when the brakes of your towed car are being applied. 1-800-940-8924 to order Roadmaster flat tow brake system part number RM89ZR or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for RoadMaster Stop Light Switch Kit. Flat Tow Brake System reviews from real customers.
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Roadmaster Flat Tow Brake System - RM89ZR

  • Stop Light Switch
  • Roadmaster

Avoid damage to your vehicle by ensuring that your supplemental braking system is properly positioned and working effectively. Kit activates your RV monitoring system to alert you when the brakes of your towed car are being applied.


Features:

  • Activates motorhome brake-monitoring system whenever brake pedal in towed car is applied
    • Ensures that the supplemental braking system is functioning properly
  • Works great for any application that does not have a tow position in the ignition
  • Wires directly into towed car's fuse box for constant current
  • Made in the USA


Specs:

  • 12 Volts
  • Application: custom fit for your vehicle


This kit allows your RV's monitoring system to alert you whenever the brake pedal of your towed car is being applied. Other systems operate according to whether the air cylinder is extended and provide no indication of what is happening with the pedal itself. If your supplemental braking system is improperly installed, it may be continuously pressing on the pedal, impeding it from fully retracting and possibly causing damage to your vehicle's tires and braking system. With Roadmaster's Stop Light Switch Kit, you will always know when the brake is being depressed, and you will avoid costly damage.

751506 Road Master Stop Light Switch Kit



This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.8

607 reviews
Avoid damage to your vehicle by ensuring that your supplemental braking system is properly positioned and working effectively. Kit activates your RV monitoring system to alert you when the brakes of your towed car are being applied.

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See what our Experts say about this Roadmaster Flat Tow Brake System

  • Complete Flat Towing Setup for a 2024 Ford F-150 Raptor
    Daren, for your 2024 Ford F-150 Raptor you are going to need: - A base plate kit, like the etrailer Invisible Base Plate Kit # e86YR, - A set of tow bars, like the etrailer XHD Non-Binding Tow Bar # e94ZR, - A braking system, like the Roadmaster BrakeMaster w/ Pressure Reducer for RVs w Air or Air-Over-Hydraulic Brake # RM-9160-900002, using the RoadMaster Stop Light Switch Kit # RM89ZR and the Roadmaster BrakeMaster Custom Fit Seat Adapter # RM-88316, & - A wiring harness, like the...
    view full answer...
  • Trouble Finding Brake Light Wire on a 2025 Ford F-150
    Hey Dennis, thanks for reaching out! According to the Roadmaster fitguide you're going to need a brake light switch as well since they weren't able to locate the color of the OEM brake light circuit wire. You'll use part # RM42MR if you have an adjustable brake pedal, or part # RM89ZR if you don't have an adjustable brake pedal. Once the brake light switch kit is in place, you'll have the signal you need to install the Brake-Lite Relay Kit # RM-88400. Are you installing all of your flat...
    view full answer...
  • Correct Roadmaster BrakeMaster Seat Adapter for a 2024 Ford F-150
    Hey Steve! The correct seat adapter for your 2024 Ford F-150 is the Roadmaster item # RM-88316, you were looking at. This is designed for the Roadmaster BrakeMaster item # RM-9160-900002 and item # RM-9060-900002. You're also going to need a stop light switch. There's two options depending on what brake pedals you have. I have listed them below: Adjustable Pedals - Roadmaster Stop Light Switch Kit item # RM42MR Non-Adjustable Pedals - RoadMaster Stop Light Switch Kit item # RM89ZR
    view full answer...
  • Recommended Flat Towing Wiring Harness for a 2024 Ford F-150
    What a great question Howard. You should direct that request to Curt, Blue Ox, or Demco though. We don't make the wiring harnesses like the Curt item # C75WR you purchased, which does not have diodes in it. No one makes a plug and play for a 6-Way flat towing connection. The diodes included in the Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights item # RM38FR, or item # RM-152-1676-7 if you don't have LED lights, are installed to prevent feedback between a RV's electrical...
    view full answer...
  • Complete Flat Tow Set Up For 2024 Ford F150 4x4 Hybrid
    Hello Vance. Wow, that is a nice truck to pull behind your motorhome! Here are all the parts I recommend for flat towing your 2024 Ford F150 4x4 Hybrid: -Base Plate Kit: Demco Tabless Base Plate Kit - Removable Arms # DM56MV -Tow Bars: Demco Dominator Non-Binding Tow Bar - RV Mount - 2" Hitch - 7,500 lbs # DM9511008 -Wiring Kit: For LED tail lights- Roadmaster Smart Diode 7-Wire to 6-Wire Wiring Kit for Variable Voltage LED Tail Lights # RM38FR. For Incandescent tail lights- Roadmaster...
    view full answer...
  • Steps To Find Cold Side Brake Light Switch Wire On 2023 Ford F-150 When Installing Brake Controller
    We haven't had a chance to install a brake controller in a 2023 Ford F-150 yet (3/27/2023), so I can't tell you the wire color but I can tell you how to figure out which one you need to hook to. You'll need to use a circuit tester like # PTW2993 and with the truck on but not running, press the brake pedal and test the wires going to the brake switch (this will be a plastic looking thing on the brake pedal arm). You're looking for one that only has power when the pedal is pressed. If you...
    view full answer...
  • Availability of Light to Know when Flat Towed Vehicle Brakes are Applied
    Hey Keith, we have the Roadmaster Universal Braking Monitor part # RM-9530 which will give you exactly what you are looking for.
    view full answer...
  • 2019 Ford F-150 Flat Tow Parts Recommendation with Blue Ox Avail Tow Bar
    I'm happy to help you get your 2019 Ford F-150 ready to flat tow! The Stay-IN-Play DUO braking system is another excellent choice and by going that route you won't need the Stop Light Switch Kit # RM89ZR but you will still need the Relay Kit # RM-88400 to keep the brake light signal on your F-150 from overriding the turn signal from the RV when you're applying the brakes during a turn. With the parts listed out here is the bare minimum that you need: etrailer Invisible Base Plate Kit -...
    view full answer...
  • Location of Cold Side of Stop Light Switch for Brake Controller Installation on 2022 Ford F-150
    It looks like the OEM brake light switch is unusable on the 2022 Ford F-150. To complete the installation you will need to add the RoadMaster Stop Light Switch Kit # RM89ZR if you do NOT have an adjustable brake pedal or # RM42MR if you DO have an adjustable brake pedal. The red wire on your # RED52VR will connect to this to complete the installation.
    view full answer...
  • 2019 Ford F-150 etrailer and Blue Ox Base Plate Kit Recommendation for Blue Ox Tow Bar
    Yes, the etrailer Base Plate Kit # e86YR is compatible with the Blue Ox Avail Tow Bar # BX7420 but you will need the Adapter Kit # DM9523127. I recommend using the etrailer Base Plate Kit # e86YR over the Blue Ox Base Plate Kit # BO74FR for your 2019 Ford F-150. The base plate kits are virtually the same when it comes to quality so since you like the looks and price point of the etrailer kit better that's what you should go with. You will also need some additional parts for flat towing...
    view full answer...
  • Can I Flat Tow a 2019 Ford F-150 With My Motorhome
    People flat tow pickups all the time and from what I could find it looks like your 2020 Thor Challenger 37TB can tow up to 8,000 lbs (you'll want to verify this in your owner's manual) which is more than enough for towing your 2019 Ford F-150. As far as recommendations go, I really like the Roadmaster products because they put a lot of thought into their designs so the only thing non-Roadmaster that I'll have is the tow bar simply because it's hard to argue with the price-point of our...
    view full answer...
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Do you have a question about this Flat Tow Brake System?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Ryan G
Installed by:
Ryan G
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S

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