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Roadmaster Stop Light Switch Kit - Fiat

Roadmaster Stop Light Switch Kit - Fiat

Item # RM-751455
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Tow Bar Braking Systems
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Roadmaster Stop Light Switch - RM-751455
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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. Lowest Prices for the best tow bar braking systems from Roadmaster. Roadmaster Stop Light Switch Kit - Fiat part number RM-751455 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (5)
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Roadmaster Tow Bar Braking Systems - RM-751455

  • 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.


  • 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


  • 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.

751455 Road Master Stop Light Switch Kit

Installation Details RM-751455 Installation instructions

This Product Fits The Following Vehicles

Customer Reviews

Roadmaster Stop Light Switch Kit - Fiat - RM-751455

Average Customer Rating:  5.0 out of 5 stars   (5 Customer 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.


Installation was tight on the Fiat 500 but the instructions were right on. No issues since installation. It's performing well.

It continues to work trouble free. Its a quality product.
Wendell - 12/02/2020


Perfect, and the followup by etrailer second to none. It is nice to have their expertise in your corner.


Works great. A little tricky to install but hasn’t needed any adjustments or attention at all.


Great service,Great product,Great price and follow up. What more could I ask for?



See what our Experts say about this Roadmaster Tow Bar Braking Systems

  • Why Is The Stop Light Switch Needed On A 2012 Fiat 500
    I am not entirely sure I understand what you are asking. The reason that you will need to install the Roadmaster Stop Light Switch Kit part # RM-751455 on your 2012 Fiat 500 is because the stop light circuit goes dead while the vehicle is in tow. Since the stop light circuit goes dead while in tow there would be no way to signal the motorhome that the brakes in the vehicle are being applied by way of a supplemental braking system. Therefore, a stop light switch kit is needed. The power...
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  • Troubleshooting Why Stop Light Function On Flat Tow Wiring Of Fiat Not Working
    Based on your information, you need a stop light switch to complete your flat towing setup of your Fiat which is very common. I recommend the Roadmaster Stop Light Switch Kit, Item # RM-751455. This switch wires directly into the fuse box for constant current. Before flat towing your Fiat, be sure to consult the owner's manual for recommendation or suggestions. I have also included some helpful links to additional information for you to check out.
    view full answer...
  • Supplemental Braking System Recommendation to Flat Tow a 2012 Fiat 500 Behind an RV
    In the world of supplemental braking systems the discontinued AutoStop BX8893 is one of the more difficult installations. While it seems like a simple set up the reality is that routing the cable to the brake pedal can be complicated. Also if the breakaway system is used BRK3050 and gets tripped the system has to be sent back to the manufacturer to reset it. In short I would advise against this system and go with a less complicated braking system. One of the preferred systems for our installers...
    view full answer...
  • Can Wiring From Stay-IN-Play DUO Controller be Connected to Tow Bar Wiring on 2014 Fiat 500
    Yes, you can connect the wiring from the controller that comes with the Demco SBS Stay-IN-Play DUO Supplemental Braking System # SM99251 to the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 you've installed on your 2014 Fiat 500. I don't have any specific routing instructions for the wiring other than you'll want to avoid any hot or moving parts, and there should be a grommet or something of the sort that allows you to pass the wiring through the floorboard or kick...
    view full answer...
  • ICX Transmitter Installation On 2013 Fiat 500 With Roadmaster Even Brake Portable Braking System
    For your 2013 Fiat 500, the Roadmaster Stop Light Switch Kit - Fiat # RM-751455 is required as well as the 12 Volt Outlet Kit, 20 amps # RM-9332. The stop light switch lets you know in your motorhome when the brakes of your Fiat are being applied and the green wire connects to the black wire of the switch and then to terminal 1 of the ICX transmitter. The power for the switch comes directly from the vehicle battery thru a fuse so the ignition position is not an issue as it is bypassed....
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  • Base Plates For 2012 Fiat 500C With Roadmaster Falcon 5250 Tow Bar
    We can get your 2012 Fiat 500C set up with baseplates for your Roadmaster Falcon 5250 tow bar, and I verified directly with Roadmaster that the correct fit for your Fiat is the following: - Roadmaster Crossbar-Style Base Plate Kit # 522013-1A You mentioned other hardware, and while there isn't any other hardware needed for the base plates, I'll go ahead and list out the other parts you'll need to flat tow your Fiat 500C in case you need those parts. - Safety Chains: Roadmaster Safety...
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  • Procedures and Equipment for Flat Towing 2016 Fiat 500 Manual Transmission
    When flat towing your 2016 Fiat 500 Easy, you'd leave the steering wheel unlocked to avoid tire scrub. I've checked the owner's manual, as well as the industry resources at my disposal and have found that it's not necessary to pull any fuses or disconnect the battery. To flat tow a vehicle, you'll need base plates, a tow bar, safety cables, a wiring solution so the vehicle taillights work along with those of the tow vehicle, a supplemental braking system and possibly a high/lo adapter. For...
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  • Will Older Falcon Tow Bar Fit Roadmaster Base Plates for a 2015 Fiat 500 Pop
    Your Falcon tow bar will work with Roadmaster base plates # 522013-1A for the 2015 Fiat 500 Pop. Most Roadmaster tow bars use that crossbar you mentioned and it is still used for the new versions of the Falcon series. The tow bar, assuming it is in good working order, will work well with your Fiat. No worries, it sounds like you have things under control! If you do not have safety cables I recommend # RM-643. The coiled design helps keep the cables off of the ground. If you do not yet...
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  • How to Flat-Tow a 2015 Fiat 500
    In order to flat-tow a 2015 Fiat 500 with all four wheels on the ground behind a motorhome you are going to need a tow bar, base plate kit, safety cables, tail light wiring harness, supplemental braking system, and possibly a high-low adapter. There may also be a few other smaller components that are needed depending on the options the vehicle is equipped with. For a tow bar, I recommend the Roadmaster Nighthawk All Terrain Tow Bar part # RM-676. The Nighthawk is one of the best tow bars...
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  • Recommendations for Towing a 2017 Fiat 500 Behind a Motorhome
    If you have the automatic transmission, then your 2017 Fiat 500 FWD must be towed using a tow dolly like # RM-2050-1. This is due to the transmission design style to prevent damage. If you have the manual 5 speed, you can tow it as it with a speed restriction of 65 mph. If you have the manual 5 speed transmission, I recommend the following: *Roadmaster EZ2 Base Plate Kit - Removable Arms # 522013-1A *Roadmaster Falcon 2 Tow Bar - Motorhome Mount - 2" Hitch - 6,000 lbs # RM-520 *Safety...
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  • Parts Needed to Flat Tow a 2012 Fiat 500 Behind a Motor Home
    I went out to the warehouse and opened up a box of the Blue Ox base plates # BX2801. They do indeed have removable tabs! We are going to take new pictures to show all the parts including the tabs. In addition to the base plates you will also need a compatible tow bar. I recommend the Alpha # BX7380. It is rated for up to 6,500 pounds and includes safety cables. I have linked a review video for you. For lighting you can use a magnetic kit such as # RM-2120 or for a more permanent solution...
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  • Recommended Supplemental Braking System to Flat Tow a 2019 Fiat 500
    The supplemental braking system I recommend for a 2019 Fiat 500 is the Stay-IN-Play DUO Supplemental Braking System part # SM99251 if the coach has hydraulic brakes or the Air Force One Supplemental Braking System part # SM99243 if the coach has air brakes. The Stay-IN-Play and Air Force One are two of my favorites because they are generally easier to install than most other permanent options. If you will not be installing the system yourself then the easier install means you could potentially...
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  • Recommended Base Plates For 2012 FIAT 500C Pop And Complete System
    For your 2012 FIAT 500C Pop, I recommend the Roadmaster EZ2 Base Plate Kit - Removable Arms # 522013-1A which is a confirmed fit. The brackets on this baseplate system are easy to install and remove with a simple twist to lock or unlock them. I recommend mountiing these baseplates using Loctite Threadlocker # LT37420. For a tow bar, I recommend the Roadmaster Falcon 2 Tow Bar - Motor Home Mount - 2" Hitch - 6,000 lbs # RM-520 which will fit with these baseplates and your vehicle. I...
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  • What Is Needed To Flat Tow 2012 Fiat 500
    With Roadmaster brand base plates installed on your 2012 Fiat 500 but missing the arms, you simply need to select Roadmaster Replacement Arms for Base Plate Kits, # RM-ARMS and scroll to the pdf of "Installation Details" to complete the form. Because Roadmaster (currently) only offers the # 522013-1A for your vehicle, this makes it easy to identify what your part number. But please verify against the tag on what is installed. If you are not only missing the arms but the cross bar too,...
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  • Can the etrailer Trailer Hitch Receiver Lock Be Used for Flat Towing?
    Neither the item # e98882 and the item # e98880 locking hitch pins have an official weight capacity because it exceeds what the trailer hitches are capable of. They can easily handle a 2015 Fiat 500 being flat towed behind your Forest River RV. I have some recommendations on parts you will need to flat tow your 2015 Fiat 500. You are going to need a tow-bar, a baseplate kit, a safety cables, tail light wiring harness, supplemental braking system, and possibly a high-low adapter. I have...
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  • List of Parts Needed to Tow Flat-Tow a 2018 Fiat 500 Abarth
    I have attached a list of parts below that you will need to flat-tow your 2018 Fiat 500 Abarth. Please note, Demco does not make a set of base plates for this vehicle but you can still use your Demco Excali-Bar III Non-Binding Tow Bar part # DM9511013 with the adapter listed below. Demco Tow Bar Adapter for Roadmaster Base Plates part # DM9523001 Roadmaster Crossbar-Style Base Plate Kit part # 522013-1A Curt Towed-Vehicle RV Harness part # C58911 SMI Stay-IN-Play DUO Supplemental Braking...
    view full answer...
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  • Flat Towing Set Up for 2013 Fiat 500
    I would be happy to help you set up your 2013 Fiat 500 for flat towing. You can only flat-tow your Fiat if it has a manual transmission. If you have an automatic transmission you will need the Demco Kar Kaddy X Tow Dolly w/ Disc Brakes - Tilt Bed Frame - 4,800 lbs - Wide Tread item # DM9713093. You are going to need a tow bar, base plate kit, wiring harness for lights, supplemental braking system, a battery charge line, stop light switch, and potentially a high low adapter. If you don't...
    view full answer...
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  • What is the Best Way to Tow a 2012 Fiat 500 Behind a Motorhome
    According to the owner's manual for a 2012 Fiat 500 with a manual transmission (excluding 500c and 500 Abarth), the vehicle can be flat towed with all four wheels down and dolly towed with either the front two or rear two wheels off of the ground. In regards to which is better between flat-tow and dolly tow, they both have their benefits. If you have a leased vehicle or don't want to make any modifications as you plan to exchange it, dolly tow would be your best option but if you plan to...
    view full answer...
  • Flat Tow Set-Up For 2015 Fiat 500
    We can help you with this, I have attached a couple short help articles that provide an explanation of the needed parts and their function that you will hopefully find of value. You are looking at five primary components for a safe flat towing setup. These are (1) Base Plates that mount to the front of your 2015 Fiat 500 and provide the mounting point between the car and the motorhome for the (2) Tow Bar. You will also need (3) Safety Cables in case a failure of the Tow Bar occurs, this...
    view full answer...

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