I use the 7 pin on my 3rd gen runner for pulling trailers with brakes. For the lighter loads the above works great for small trailers. Most of the electrical problems I deal with on these trucks is where some one has installed aftermarket stereos or hardwired in a trailer wiring.

 

My 94 was bought new by my dad and came with the converter box. My 89 I don't know. It's custom. However the wiring is all factory and has the same converter as my first truck. Hence my confusion.

 

Again Great information. Thanks for all feed back!

 

As I did so much work on Horse Trailers from Women in a hurry neglecting to unplug light cords It was nice to have a 7 pin plug on all the vecicles

 

Hey rooster what was the final answer? Did your truck already have the box or is that the part you needed?