How To Hook Up Boat Trailer Lights. Drove it over to the boat trailer (but did NOT hook the trailer up) and pluged it in to the TRAILER side connector plug - NADA, NOTHING??? The Right and Left Turn Signals work and the Brake lights work, but the running lights are not on.
Troubleshooting: So you hook up the rig, walk to the rear of the trailer, and have your tow vehicle partner turn on the headlights and test the running lights, turn. I hooked that to a flasher from the auto parts store and connected both left and right brake lights on the trailer to the flasher output. To hook up a trailer with a latch style coupler, double check to make sure your ball is the same size as the coupler.
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Check the regulations in your area Refer to your manufacturer's guidelines for more information on how to hook up your trailer hitch before.
If not, do you have any suggestions for hooking up trailer lights? kits? etc. thank you, Dave. I hooked that to a flasher from the auto parts store and connected both left and right brake lights on the trailer to the flasher output. Done incorrectly, towing a trailer behind your vehicle is a safety hazard -- too.