Is A Battery Disconnect Switch Needed To Flat Tow A 2020 GMC 2500 HD?
Question:
I’m having a roadmaster tow bar and braking setup install on my 2020 GMC . I’m told by the shop,I do not need to disconnect the battery cable because they are installing a charger to keep the batteries charged, I’m trying to find out if this is correct . Thanks
asked by: Andy W
Expert Reply:
The purpose of a battery disconnect is not meant to keep the batteries charged but to protect certain onboard electronics. In your vehicle's case, is meant to keep the Electric Parking Brake disconnected.
If the battery is left connected, or the battery cable contacts the post, it could activate the electric parking brake and cause the vehicle to crash.
So I still recommend installing a battery disconnect switch on your 2020 GMC Sierra 2500.
The Roadmaster Automatic Battery Disconnect with Switch for Towed Vehicle w/ Supplemental Braking System # RM-766 will work great for your truck. This kit includes a switch that will allow you to disconnect your battery from the convenience of your toad, and a corrosion-resistant, marine-grade solenoid with 200-amp constant duty, and 600-amp surge.
If the braking system you're using will use power from your toad while disconnected, then I also recommend installing a Roadmaster Battery Charge Line Kit for Towed Vehicles # RM-156-25, which will keep your battery charged while the battery is disconnected.
The only other components you'll need is, a base plate kit like # RM86FR, and a set of wiring # RM-152-98146-7.
Products Referenced in This Question
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Wire to 6-Wire Straight Cord
- Tow Bar Wiring
- Splices into Vehicle Wiring
- Diode Kit
- Universal
- Tail Light Mount
- Roadmaster
more information >
Roadmaster Battery Charge Line Kit for Towed Vehicles
- Accessories and Parts
- Tow Bar Wiring
- Battery Charge Line Kit
- Roadmaster
more information >
Roadmaster Direct-Connect Base Plate Kit - Removable Arms
- Base Plates
- Removable Drawbars
- Hitch Pin Attachment
- Roadmaster
more information >
Product Page this Question was Asked From
Roadmaster Battery Disconnect with Switch for Towed Vehicle w/ Flat Tow Brake System - Gas
- Accessories and Parts
- Tow Bar Wiring
- Auto Battery Disconnect
- Roadmaster
more information >
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