How should a reverse lockout solenoid be maintained and what are the signs of failure?

Reverse lockout solenoids should be periodically inspected to ensure proper operation. Regular maintenance includes checking for corrosion on electrical connections, inspecting for debris or blockages in fluid passages, and verifying that all fittings are secure and free of leaks.

Common symptoms of a failing solenoid include:

• Brakes dragging in reverse – indicates the solenoid is not fully releasing hydraulic pressure.

• Brake fluid leakage – suggests worn seals, loose fittings, or internal damage.

• Loss of brake function in reverse or forward – may be caused by electrical failure, clogging, or internal malfunction.

If any of these issues are observed, the solenoid should be tested and replaced as necessary to maintain safe trailer brake operation.