Installation Instructions for Roadmaster Brake Lite Relay and Brakemaster 9000
Question:
how do i wire it to 2013 ford f1504x4
asked by: Steve A
Helpful Expert Reply:
There are two methods of installation for the Roadmaster Brake Lite Relay part # RM-88400 that you referenced, open and closed.
Most towed cars require the normally open installation method. Ford and Lincoln models with neutral tow kits and most automobiles that have a push-button start function will require the normally closed installation. Check out the diagram that details the installation.
Remove the blue wire from the kit. This wire is not needed for normally open applications.
Locate the brake-light-switch wire in your towed car.
Remove the brake light fuse.
Cut the brake light wire a few inches away from the "cold" side of the brake light switch.
Attach the relay to the wiring for the RV braking monitor. The diagram above shows where the green wire attaches the relay to either a Roadmaster Even Brake or BrakeMaster system.
Connect the black wire of the relay to the brake light wire near the brake light itself using the included blue butt connector.
Connect the red wire to the "hot" side of any fuse that is powered only when your ignition is on. Use the included spade connector and fuse tap.
Ground the white wire to your towed vehicle's frame.
Secure the relay with the included wire ties.
If you have a Ford or Lincoln that has a neutral tow kit or if your car has a push-button start feature that will not start the engine when the brake fuse is removed, then you need to perform a normally closed installation. Be sure to follow the instructions included with your relay kit for a more detailed process. Normally closed operations may require additional connectors and length of wire that are not included with this kit. Attached diagram for this as well.
Remove the green wire from the kit. If you are using a Roadmaster Even Brake supplemental braking system, set this wire aside to use later.
Locate the brake-light-switch wire in your towed car.
Remove the brake light fuse.
Cut the brake light wire a few inches away from the "cold" side of the brake light switch.
Attach the relay to the wiring for the RV braking monitor. The diagram above shows where the blue wire attaches the relay to either a Roadmaster Even Brake or BrakeMaster system. The green wire may be needed here.
Connect the black wire of the relay to the brake light wire near the brake light itself using the included blue butt connector.
Use a voltmeter to identify the wire in your aftermarket light harness that is conducting the tail light signal. Typically, this is a brown wire.
Using a 16 - 14 gauge butt connector (sold separately), attach a section of 14-gauge wire (sold separately) to the end of the red wire. Trim the new 14-gauge wire and connect it to your aftermarket wiring harness.
Start your engine and turn on your headlights. Test the tail light wire with a voltmeter. If your voltmeter doesn't register any voltage, move on to step 10. If 12V DC registers, you will need to install a single diode (RM-790; sold separately).
Ground the white wire to your towed car's frame.
Secure the relay with the included wire ties.
I noticed you also mentioned the Brakemaster 9000, I attached installation instructions for this product as well to the right under the helpful link heading.
Products Referenced in This Question
Roadmaster BrakeMaster w/ Pressure Reducer for RVs w/ Hydraulic Brakes - Proportional
- Tow Bar Braking Systems
- Brake Systems
- Proportional System
- Recurring Set-Up
- Fixed System
- Power Assist Brake Compatible
- Hydraulic Brakes
- Roadmaster
more information >
Roadmaster BrakeMaster w/ Pressure Reducer for RVs w Air or Air-Over-Hydraulic Brakes - Proportional
- Tow Bar Braking Systems
- Brake Systems
- Proportional System
- Recurring Set-Up
- Fixed System
- Power Assist Brake Compatible
- Air Brakes
- Air Over Hydraulic Brakes
- Roadmaster
more information >
Product Page this Question was Asked From
Roadmaster Brake-Lite Relay Kit for Towed Vehicles
- Tow Bar Braking Systems
- Brake Light Relay
- Roadmaster
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Vehicle Tow Bar Brake System
- Shop: Vehicle Tow Bar Wiring
- Shop: Second Vehicle Kit for Demco Air Force One Flat Tow Brake System
- Video: Demco SBS Wireless Coachlink Installation - 2019 Newmar Ventana Motorhome
- Shop: Roadmaster Stop Light Switch Kit
- Shop: Roadmaster Stop Light Switch Kit
- Shop: Demco Wireless Coachlink Braking Monitor for Flat Tow Brake Systems
- Shop: Roadmaster BlackHawk 2 All-Terrain Non-Binding Tow Bar - RV Mount - 2" Hitch - 10,000 lbs
- Search Results: blackhawk 2
- Search Results: 9599005
- Search Results: 910021~00
- Q&A: LED Monitor on Demco SBS Air Force One Supplemental Braking System Stays Illuminated
- Shop: Replacement Quick Disconnect Crossbar Assembly for Roadmaster Tow Bars
- Shop: Demco Vacuum Tee Fitting for Factory Brake Booster Sensor Port - Air Force One and Stay-IN-Play Duo
- Search Results: sm99209
- Article: Trailer Wiring Diagrams
- Q&A: How to Ground Custom Third Brake Light Camera for 8" Factory Monitor For Ford F-250/F-350 Super Duty
- Video: Roadmaster Brake-Lite Relay Kit Installation - 2023 Ford Maverick
- Shop: Trailer Wiring
- Video: Roadmaster Universal Diode Wiring Kit Installation - 2016 Kia Soul
- Video: Roadmaster Universal Diode Wiring Kit Installation - 2021 Jeep Wrangler
- Search Results: dual receiver
- Search Results: double tow hitch
- Shop: Base Plate for Tow Bar
- Video: Roadmaster Universal Diode Wiring Kit Installation - 2022 Jeep Gladiator
- Search Results: 15267
- Video: Roadmaster Brake-Lite Relay Kit Installation - 2017 Ford F-150
- Video: Roadmaster Brake-Lite Relay Kit Installation - 2018 Ford F-150
- Shop: Trailer Hitch
- Shop: RV Mattress