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How to Easily Disconnect Battery to Flat Tow Vehicle

Question:

I have 2020 gmc to flat tow and it has to disconnect negative battery post what option out there to make this simple and convenient. Thanks for ur time

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Expert Reply:

We've got just what you need. I'd recommend the Roadmaster Automatic Battery Disconnect, part # RM-766. Once installed, the auto disconnect will allow you to disconnect the battery for flat towing with the simple push of a button. The installation isn't too difficult, as you can see in the linked installation video.

There are a few caveats you should be aware of, however:

• Disconnecting the battery, whether manually or with the Roadmaster automatic disconnect, will affect your vehicle's
electronics. You will need to reset various electrical components in your vehicle following use of this product.

• Not for use with diesel engine vehicles, due to the high compression ratio of diesels the engine can surge up to 10
times that of a gasoline engine at start up and can cause the solenoid to fail.

• A charge line, ( # RM-156-25 - sold separately), is a good idea if you have a braking system that is using power from
the towed vehicles battery while it is disconnected.

expert reply by:
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Mike L

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