Using Supplemental Brake System On 2012 Ford Focus With Battery Disconnected

Updated 07/22/2014 | Published 07/20/2014

Products Featured in This Question

Roadmaster Direct-Connect Base Plate Kit - Removable Arms

(3336)

$575.00

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

(373)

$209.41

12 Volt Outlet Kit, 20 amps

(331)

$39.69

Roadmaster Even Brake Portable Flat Tow Brake System - Proportional

(56)

$1930.00

Question:

2012 Ford Focus instructs us to disconnect our battery for towing behind our RV. So how does our Roadmaster Even Brake work without the battery??? Without the battery our 12 volt does not work where we have to plug in the even brake.

asked by: Sharon

Expert Reply:

When flat-towing your 2012 Ford Focus, you can still use the Roadmaster Even Brake Portable Proportional Braking System, part # RM-9400.

I recommend using the Roadmaster 12 Volt Outlet Kit, part # RM-9332. This attaches to your battery and will provide the power needed for the # RM-9400.

Because of the hassle of disconnecting the battery by unhooking the cables, you can use the Roadmaster Automatic Battery Disconnect for Towed Vehicles, part # RM-766. This automatically cuts the power from the battery to the vehicle when the vehicle is connected to the RV and the RV headlight switch is on. The battery will receive its charge from the RV through a wire connected to the tail light wire on the 4-way connector. I have attached an installation video for this disconnect you can check out.

expert reply by: Jeffrey L