Some customers feel that no Supplemental brake system will work on a tow vehicle unless the brake booster has vacuum when in tow. Night Shift Auto has come out with a vacuum pump to power the brake booster to help customers through this dilemma.

The pump is only activated when the brake booster drops below 11 inches of vacuum. The pump will then stay on until it reaches 15 inches of vacuum.

To see how this device works in more detail go to our installation instructions and download the vacuum pump installation instructions.