First time at the boat ramp!

First time towing and at the boat ramp today. Overall it went very well, super easy to tow a small jetski, the only time I feel it's weight is during breaking, otherwise I can't even tell it's pulling it.
I didn't disconnect the electrical plug going to the trailer, but wondering if that's waterproof, like can it be submerged under water? Otherwise for next time I would unplug it if that makes any difference really.

 

Just pulled them out of the water, same as launching, but easier. I unplug mine to prevent popping taillight bulbs

 

I always unplug my lights prior to launching my boat. Why risk it?

 

It depends on the trailer's lights. If they are sealed then you can leave the umbilical plugged into the trailer. If they aren't then the bulbs (if you're still using bulbs) will break because they are hot. If they are LED then it probably doesn't make a difference. The trailer lights should be sealed or you'll eventually get corrosion in the sockets. I converted the ones on my boat trailer to LED but even the OEM set was sealed and so are the marker lights on the side of the trailer.

If you're asking about the connection to the 4Runner then no. I've never disconnected the umbilical from my 4Runner when launching/recovering. I have a separate connector for my 4Runner that plugs 1 end into the 7-wire socket on the 4Runner and the other end plugs into the trailer harness. I do have sealed lights on the trailer, LED and bulb.

 

My trailer does have the LED lights all around and it plugs into the 4 pin on the 4Runner side. Everything seems to be sealed properly, but just wanted to make sure I'm not missing anything. My concern is where it gets plugged into the 4Runner plug (the 4 pin plug).

 

I have the 7-pin connector but even in previous years I unplugged only when I had the old boat trailer that had the bulbs. After blowing out a bunch of bulbs because they were hot I learned to do that. You do have to remember to reconnect after recovering your boat. With LEDs the worst case would be you would blow a fuse. I have a bass boat so my connector never gets in the water, so I don't unplug anything. Do you have to back down the ramp that far that your 4-pin is in the water?