Troubleshooting Locked Up Brakes When Disconnecting Towed Vehicle With Demco Air Force One System

Published 03/14/2022

Question:

Air Force One - Issue with brakes locked on car after disconnected from motorhome. Thank you

asked by: Sal S

Expert Reply:

When you disconnect your towed vehicle from the motorhome your Air Force One Demco Air Force One Supplemental Braking System for Motor Homes with Air Brakes # SM99243 you'll need to ensure that you replace the plug in the breakaway sensor otherwise the system will think your vehicle is in a breakaway situation and apply the brakes.

If you do have the plug in the breakaway sensor then the next step would be to cut power to the system and let it sit for awhile to fully reset and then reconnect the power.

I also recommend checking the wiring running from the system to the breakaway switch as you might have some damaged wiring causing this issue.

expert reply by: Kevin C