Checking Boat Trailer Brakes

After winter layup on the trailer, before I take Big Duck out for the first time I like to know the trailer is in good shape. This means a check of the, lights, bearings and brakes.

I check the lights by using a vehicle plug in the trailer connector. This way I can pull 12vdc off the trailer breakaway battery and use it to test turn, brake and running lights.
Testing the trailer lights

I don't disassemble the hubs every year, but I do like to check the bearings by jacking the wheel off the ground and spinning it. I expect a smooth and quiet spin, no scraping, no grinding and no hesitating or abrupt stopping.

I also check the brakes. Being totally electric, the trailer brakes are a snap to test while I have the wheel off the ground. I use the same plug setup as I do for the lights, but I have rigged a plug, wire and push button specifically for the brakes. The push button completes the circuit from the breakaway battery to the brakes and energizes the brakes with a full 12 volts. The wire is long enough that the button can be worked while giving the wheel a spin.

Vehicle coupling in trailer coupler with plugs and push button for trailer brake test.