• Let lights cool down before submerging by unplugging the lights for a couple of minutes.
• Use lithium grease in the socket to reduce the corrosion that water can cause.

 

The way that was recommended in the past was to unplug the trailer lights before submerging but due to the fact that most boat trailers use surge brakes with disc brakes you must have the trailer lights plugged into the tow vehicle in order to disengage the brakes and back up trailer which will not work if left unplugged.