bing tracking image
  1. Accessories and Parts
  2. Roadmaster
  3. Flat Tow Wiring Harness
  4. Battery Disconnect
Roadmaster Battery Disconnect for Towed Vehicle w/ Flat Tow Brake System - Diesel
Roadmaster

Roadmaster Battery Disconnect for Towed Vehicle w/ Flat Tow Brake System - Diesel

Part Number: RM93MR
In Stock
ChristmasTree SantaHat Arrives before Christmas SantaHat ChristmasTree
$227.69
Retail:$242.13
You Save: $14.44
Accessories and Parts
Add to cart
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
If you need to disconnect the battery to flat tow your vehicle, you're going to want this kit. It disconnects your battery with the turn of a knob - much safer and faster than doing it yourself - while keeping your towing accessories charged. 1-800-940-8924 to order Roadmaster accessories and parts part number RM93MR or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Battery Disconnect for Towed Vehicle w/ Flat Tow Brake System - Diesel. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (9)
  • Q & A (0)
  • Photos

Roadmaster Accessories and Parts - RM93MR

  • Flat Tow Wiring Harness
  • Battery Disconnect
  • Roadmaster

If you need to disconnect the battery to flat tow your vehicle, you're going to want this kit. It disconnects your battery with the turn of a knob - much safer and faster than doing it yourself - while keeping your towing accessories charged.


Features:

  • Disconnects your battery with the turn of a knob
  • Eliminates the inconvenience and danger of pulling your battery cable yourself
  • Provides a positive current source for the breakaway switch and other accessories without draining the battery
  • Includes a corrosion-resistant, marine-grade solenoid with 300-amp constant duty and 1000-amp surge
    • Comes pre-assembled for easy installation


Specs:

  • Application: vehicles that require the battery to be disconnected for flat towing - consult your owner's manual
    • Works with almost any 12V battery
    • Designed for diesel engine vehicles, but also work with gas engine vehicles


Notes:

  • Disconnecting the battery, whether manually or with this automatic disconnect, will affect your vehicle's electronics. You will need to reset various electrical components in your vehicle following use of this product.
  • A charge line kit (RM-156-25 - sold separately) is recommended if you have a braking system that is using power from the towed vehicle's battery while it is disconnected.
  • 1 Battery disconnect is needed per battery - vehicles with 2 batteries will need 2 battery disconnects.


767 Road Master Automatic Battery Disconnect Switch for Diesel Vehicles

Installation Details RM93MR Installation instructions



Customer Satisfaction Score:


Customer Reviews

Roadmaster Battery Disconnect for Towed Vehicle w/ Flat Tow Brake System - Diesel - RM93MR

Average Customer Rating:  5.0 out of 5 stars   (9 Customer Reviews)

If you need to disconnect the battery to flat tow your vehicle, you're going to want this kit. It disconnects your battery with the turn of a knob - much safer and faster than doing it yourself - while keeping your towing accessories charged.

by:

Arrived on time - have not installed ye t.



by:

Easy to set up works v ery well



by:

Works great exactly what I need



by:



by:



by:



by:



by:



by:


9
9

See what our Experts say about this Roadmaster Accessories and Parts

  • Does Negative or Positive Battery Post Get Disconnected for Roadmaster Battery Disconnect
    Yes, this is a common question we've received about the Roadmaster Battery Disconnect with Switch for Towed Vehicle w/ Flat Tow Brake System # RM93MR. Vehicle owner's manuals say to disconnect the negative post while Roadmaster always says to disconnect the positive post. Since this is a Roadmaster product you'll want to install it according to their instructions. Please note this product is for diesel vehicles and if you're using a braking system that draws power off the battery you need...
    view full answer...
  • Is it Required To Disconnect The Battery To Flat Tow a 2021 GMC Sierra 1500?
    According to the owners manual for your 2021 GMC Sierra 1500, disconnecting the battery is the only option to prevent the electric parking brake from activating when you flat tow your truck. We have the Battery Disconnect # RM-766 for gas engines or the Kit # RM93MR if you have a diesel engine. Your settings are saved in the computer memory and will remain set.
    view full answer...
  • Blule Ox Baseplate For A Diesel 2020 GMC Sierra 3500 Denali
    I checked the manual and also reached out to Blue Ox to confirm this but found no notes and Blue Ox stated that the Blue Ox Base Plate Kit # BX1739 would be a compatible fit for your 2020 GMC Sierra 3500 (diesel). If you haven't picked out the rest of your flat towing components then I have the following recommendations: Tow Bar: etrailer XHD Non-Binding Tow Bar for Blue Ox Base Plates # e67ZR. This tow bar includes safety cables so you won't have to purchase them separately. The head/shank...
    view full answer...
  • Parts Needed To Flat Tow a 2020 GMC 2500HD Behind a Class A RV Motorhome
    First you will need the Roadmaster Direct-Connect Base Plate Kit # RM86FR for the front of your 2020 GMC Sierra 2500HD. This will allow you to connect your Sierra to your class A coach using the Roadmaster BlackHawk 2 All Terrain, Non-Binding Tow Bar # RM-422. You may need a High-Low adapter like the 4" # RM-048-4 to keep the tow bars within 3" of level from vehicle to vehicle. The base plate has a height of 20-1/4" when installed on a truck with 275/65R20. The RoadMaster BlackHawk 2...
    view full answer...
  • Parts Needed to Flat Tow 2022 GMC Sierra 1500 Elevation With Blue Ox Tow Bar
    Congrats on the new ride and we can definitely get your 2022 GMC Sierra 1500 Elevation ready to be flat towed, and since you already have the Blue Ox Ascent Tow Bar # BX4370 we can get your truck compatible Blue Ox base plates. There's a number of parts needed so I'll go ahead and list them out for you to make it easy. - Blue Ox Base Plate Kit # BLU35XR - Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 - Blue Ox Patriot Portable Braking System # BLU37TR - 12 Volt...
    view full answer...
  • Recommended Parts to Flat Tow a 2024 Chevy Silverado 2500
    Yes, it can! To flat tow a 2024 Chevy Silverado 2500 you will need the following parts: Tow Bar and Safety Chains - etrailer XHD Non-Binding Tow Bar for Direct-Connect Base Plate item # e84ZR Base Plate Kit - Roadmaster Direct-Connect Base Plate Kit - Removable Arms item # RM53GR Battery Disconnect - Roadmaster Battery Disconnect Switch item # RM-766 for gas or item # RM93MR for diesel Wiring Harness - Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit item # RM-15267 Supplemental...
    view full answer...
  • Which Baseplate Kit For 2024 Chevy Colorado Works On ZR2 Model?
    Hey Chris, For your 2024 Chevy Colorado ZR2 you'll need to go with the Demco Baseplate Kit # DM27YV. As of right now (June 2024) Roadmaster does not make a base plate kit compatible with the ZR2 model of your truck. You'll still be able to use your Roadmaster tow bar by also picking up one of the below adapters depending on the model of your tow bar: If you have a Roadmaster Tracker, Falcon 2, Falcon All-Terrain, Blackhawk, Blackhawk All-Terrain, and Sterling tow bars with serial numbers...
    view full answer...
  • Recommended Battery Disconnect for a 2024 GMC Denali 1500 Diesel
    Hey Michael congrats on the new truck! The most recent video I have of the Air Force One Flat Tow Brake System item # SM99243 being installed is on a 2020 Sierra 1500. I have linked this video below. Your 2024 is the same generation so it should be a similar installation process. The correct battery disconnect for your diesel 1500 Denali is the Roadmaster item # RM93MR.
    view full answer...
  • Blue Ox Base Plates & Wiring For Flat Towing 2023 Chevy Equinox Behind Motorhome
    Hi there Eddie; thanks for the question and we can get your 2023 Chevy Equinox equipped with a Blue Ox base plate and the needed wiring so you can flat tow it behind your motorhome. There are a couple of options for the wiring depending on the type of lights you have, so I'll go ahead and list out what you need to make it easier to determine. Base Plate: Blue Ox Base Plate Kit # BX1730 Wiring (If you Have LED Tail Lights): Roadmaster Smart Diode 7-Wire to 6-Wire Wiring Kit for Variable...
    view full answer...
  • Recommended Parts to Flat Tow a 2024 GMC Sierra 2500
    To flat tow a 2024 GMC Sierra 2500 you will need the following parts: Tow Bar and Safety Chains - etrailer XHD Non-Binding Tow Bar for Direct-Connect Base Plate item # e84ZR Base Plate Kit - Roadmaster Direct-Connect Base Plate Kit - Removable Arms item # RM33GR Battery Disconnect - Roadmaster Battery Disconnect Switch item # RM-766 for gas or item # RM93MR for diesel Wiring Harness - Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit item # RM-15267 Supplemental Braking System...
    view full answer...
  • Recommended Flat Towing Set Up for a 2023 Chevy Silverado 2500
    No on a brake-lite-relay kit but you might need a stop light switch, it depends on your truck. I checked with Roadmaster and they said, If the brake lights do not work with your Silverado's ignition key turned to the "tow" position, then you need a brake light switch kit to provide a signal to the supplemental braking system. They recommend using the Roadmaster Universal Stop Light Switch Kit item # RM-751000. Some other parts you will need to flat tow your 2023 Chevy Silverado 2500 are...
    view full answer...
  • Complete Flat Tow Parts For 2024 Chevy Silverado 1500 4x4
    We can get your 2024 Chevy Silverado 1500 4x4 set up with a complete system for flat towing, and I'll go ahead and list out all the parts you need to make it easy to order: - Base Plate Kit: Roadmaster Direct-Connect Base Plate Kit # RM86MR - Tow Bar: Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676 - Wiring Kit: Roadmaster Universal Hy-Power Diode Wiring Kit # RM-152 - Battery Disconnect - GAS Engine: Roadmaster Battery Disconnect # RM-766 OR - Battery Disconnect - DIESEL...
    view full answer...
  • Parts Needed To Flat Tow A 2017 Chevy Colorado Duramax 4x4
    Yes, I can help set you up with everything you need. Lets start with the base plate and work from there. Base Plate - Etrailer invisible base plate # e98966. Tow bar - Etrailer SD non binding # e34ZR. Tow Bar Wiring - Roadmaster universal diode kit # RM-15267. Battery Disconnect - Use # RM-766 for gas models, or # RM93MR for diesel models. Please note that some vehicles have more than one battery. One battery disconnect is needed for each starting battery. Supplemental braking system...
    view full answer...
  • Blue Ox Flat Tow Set Up For 2023 GMC Sierra 1500
    We can definitely get your 2023 GMC Sierra 1500 a Blue Ox flat towing set up. To make it easy to order I'll go ahead and list out the correct parts for you: - Base Plate Kit: Blue Ox Base Plate Kit # BLU35XR - Tow Bar: Blue Ox Alpha 2 Non-Binding Tow Bar # BX7380 - Wiring Kit: Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 - GAS Engine: Roadmaster Battery Disconnect # RM-766 OR - DIESEL Engine: Roadmaster Battery Disconnect # RM93MR - Supplemental Braking System:...
    view full answer...
  • All Parts Needed to Flat Tow 2023 Cadillac Escalade With Blue Ox Tow Bar
    Sure thing, and there are a number of other parts you'll need to flat tow your 2023 Cadillac Escalade with your Blue Ox Apollo Non-Binding Tow Bar # BX7470. Those parts include base plates, wiring, a battery disconnect, and a supplemental braking system. Please note there are differences in some parts depending on if your '23 Escalade has a gas or diesel engine, and also that base plates only fit 4WD models (there are no fits for 2WD models). I'll go ahead and list the parts out for you...
    view full answer...
  • Do You Need a Battery Disconnect On a 2021 GMC Canyon With a Diesel Engine?
    Your 2021 GMC Canyon with the diesel engine should have come with a Roadmaster Battery Disconnect # RM93MR. This battery disconnect specifically is for use with a diesel engine. You should have also had a Roadmaster Battery Charge Line Kit # RM-156-25 installed to prevent the Demco Air Force One # SM99243 from draining your vehicle battery as it will need power to operate correctly.
    view full answer...
  • Will The etrailer Base Plate For 2017 GMC Canyon Allow For Connection Using Blue Ox Tow Bars?
    Yes, the etrailer Invisible Base Plate Kit # e98966 for your 2017 GMC Canyon is compatible with a Blue Ox tow bar like the Avail # BX7420. Just be sure if you are using a different tow bar that it still has the Blue Ox style ends on the bars. Blue Ox recommends using their Tail Light Wiring Kit # BX8869 and you will need a battery disconnect unless you plan on physically connecting and disconnecting your battery. Do note if you use a supplemental braking system and physically disconnect...
    view full answer...
  • What is the Difference Between your Roadmaster Battery Disconnect # RM93MR and Roadmaster's 767?
    The Roadmaster Battery Disconnect # RM93MR is the Roadmaster part number 767. This manual battery disconnect is designed primarily for diesel vehicles but can also be used on gasoline vehicles.
    view full answer...
  • Do Roadmaster Battery Disconnects Fit 2024 GMC Canyon Denali
    Hey Bob, so I checked with Roadmaster and they do have the battery disconnect kit part # RM-766 listed as a fit for the 2024 GMC Canyon gas models and the part # RM93MR for the diesel models. They did state that some truck models have two batteries and in those situations you'd need a disconnect kit for each battery. They don't list any special steps for your truck and instead recommend just the standard connections. Maybe I am not understanding your battery setup but most vehicle batteries...
    view full answer...
  • Recommended Flat Towing Parts for a 2017 Chevy Silverado 2500 Duramax Diesel
    Yes, it is. A 2017 Chevy Silverado 2500 is definitely flat towable behind an RV. To do so you will need the following parts: Tow Bar and Safety Chains - Blue Ox Avail Non-Binding Tow Bar item # BX7420 Base Plate Kit - Blue Ox Base Plate Kit item # BLU22QR Wiring Harness - Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit item # RM-15267 Battery Disconnect Switch - Roadmaster Battery Disconnect Diesel Engines item # RM93MR Supplemental Braking System - SMI Stay-IN-Play DUO Supplemental...
    view full answer...
  • Recommended Flat Towing Parts for a 2024 GMC Sierra 3500
    I sure can! I checked with Blue Ox and their item # BLU97UR base plate kit has been confirmed to fit the 2024 GMC Sierra 3500 Denali. Please note that this is the only option Blue Ox has and these do have fixed arms that are not removable. Here are some other parts you will need to flat tow your 2024 GMC Sierra 3500: Tow Bar and Safety Chains - Blue Ox Avail Non-Binding Tow Bar item # BX7420 Battery Disconnect - Roadmaster Battery Disconnect Switch item # RM-766 for gas or item # RM93MR...
    view full answer...
  • Why is Disconnecting The Battery Required When Flat Towing a 2022 Chevrolet Silverado 1500?
    Disconnecting the battery on your 2022 Chevrolet Silverado 1500 when flat towing is required per your owners manual. This is most likely to prevent excessive drain on your battery and prevent the vehicle anti-theft systems from activating. We do offer the Roadmaster Battery Disconnect for Gas # RM-766 or Diesel # RM93MR trucks. This will make disconnecting the battery much easier.
    view full answer...
  • Battery Disconnect For 2023 Chevy Silverado 1500 With Diesel Engine
    We do indeed have the correct battery disconnect switch for your 2023 Chevy Silverado 1500 with a diesel engine. I checked directly with Roadmaster and the correct part for your Chevy is the following: - Roadmaster Battery Disconnect with Switch - Diesel # RM93MR
    view full answer...
  • Roadmaster Battery Disconnect For 2018 Chevy Colorado With Diesel Engine
    The 766 will not work for your 2018 Chevy Colorado with the diesel engine; you do need the 767 battery disconnect, which we have, just under a different part number. What you need is the following: - Roadmaster Battery Disconnect with Switch for Towed Vehicle w/ Flat Tow Brake System - Diesel # RM93MR
    view full answer...


< Previous
12



Do you have a question about this Accessories and Part?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee John S
Video Edited:
John S
Employee Jonathan Y
Video by:
Jonathan Y
Employee Ethan H
Video by:
Ethan H
Employee Andy C
Installed by:
Andy C
Employee Bradley B
Installed by:
Bradley B
Employee Carrie F
Updated by:
Carrie F
Employee Amanda K
Written by:
Amanda K
Employee Jesse B
Test Fit:
Jesse B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.