Quick check of my facts...

I am adding electric brakes to my boat trailer and just want to verify from the group here that I am heading in the right direction. My boat trailer has a 4-pin connector on it right now so I am planning on removing that and installing a 7-pin that will mate up with my 7-pin on my '08 Tacoma with towing package. If I run the two blue wires from the trailer brakes to the appropriate pin on the 7-pin connector that I'm going to be replacing the 4-pin with, and I install a brake controiller in my cab and wire it in via the wiring harness that I'll find above the drivers kick panel, I should be good to go? Read the "bible" and many other threads but most talk about adding stuff to trucks w/o the towing package. Just want to make sure I'm not missing anything here. Thanks!

 

Just get a four pin to 7 pin adapter but I didn't think there were enough connections in a four pin connector for trailer brakes.

Edit-Okay I read your post again and I'm stupid. It sounds like you are on the right track. The question I am sure you want verified is the OEM 7 pin connector is wired to conform with your new trailer plug and that a controller is a basic plug and play. Unfortunately, I cannot help you on this one. Someone will chime in.

Okay, I just looked and there is service connector for a trailer brake controller under the dash so as long as all the pin connections coincide you should be good to go.

 

The "standards" for 7 pin are pretty loose. You're going to want the Tacoma 7 pin out diagram in hand when wiring up your new custom 7 pin connector on your trailer, to make sure everything works as expected the first time.

 

Not sure what the laws are in NH but all trailers I have worked on had a break away system on it. Its a pin that pulls out if the trailer ever gets disconnected, and is required to pass inspection. I think it is only for trailers over a certain weight but I am not sure.

Other than that, as far as wiring you are correct.