08-04-2011, 08:16 PM
Join Date: Nov 2010
Location: By Ft. Worth
Hitch wires going from flat 4 to round 7 - help!!
OK, bought a new boat and the trailer needs the standard round 7 connector. I bought an adapter which uses the existing flat 4 connector for the lights and has 4 other wires:
Black: 12 volt supply
Blue: Electrical Brake
Obviously the black and white wires are a given.
Here is my question is - this boat trailer has a actuator that turns off the brakes when you put your vehicle in reverse. I am assuming that I can splice the wire to the reverse light at the back tail light. Which one is it - Yellow or Blue??
I assume blue is for an electric braking system. I'm thinking it is the yellow one.
Just to make this clear - if you have to back up and there is a hill this trailer will apply the brakes unless the reverse light comes on. Then it turns off the brakes. It is a new safety feature for when you unhitch the boat it will not roll off down a hill.