Isolating Brake Buddy Battery Charger

Updated 01/15/2021 | Published 01/13/2021

Question:

I have installed a BrakeBuddy Towed Vehicle Battery Charge Kit Item # BB54FR on my 2020 Silverado. when I disconnect the neutral on the battery, the Silverado’s electrical system becomes dead, as it is supposed to be. I have the charger wired directly to the positive and negative post of the battery, with a battery disconnect on the negative side. My ground wire for the charger is before the negative off switch. The system should be isolated, and it is until I hook up the tow vehicle, then power comes back on in the Silverado. Any suggestions? Thanks

asked by: Leo

Expert Reply:

I've found a solution for you! When disconnecting the negative side of the battery you loose power to everything in the vehicle which could include the braking system because all of his vehicle grounds are no longer grounded. With the charge line connected the way you have it, when you hook up to the motor home, because the charger is connected to both the positive and negative side of the battery, the charger now becomes the power and ground connection for the battery. This is why everything is coming back on when you connect. You need a positive battery disconnect and not a negative disconnect. I recommend Item # RM-766.

expert reply by: Adam E