Before you start the test, please answer the question below regarding your insurance status.
Without insurance you will not be able to drive in Ohio
Do you currently have car insurance?
The trailer hand valve should:
The trailer hand valve works the trailer brakes but should only be used when testing them. Using it while driving could create a skid. Never use the trailer hand valve while parking because doing so may release the air pressure from the braking system, releasing the brakes that are holding the vehicle in place.