Emergency Brake Control wiring

[VirginiaAgent]

I'm replacing the old emergency breakaway kit on my horse trailer. I bought the trailer used, so I didn't hook up the original one. It's a five wire trailer with red, white, black, blue and green.

My new control box and switch are made by "Carry-On" and it has an internal charger.

Instructions are as follow:

1. Connect the blue wire of the breakaway switch to the blue wire (battery positive) of the breakaway case.
2. Connect the black wire of the breakaway switch to the existing trailer brake wiring.
3. Connect the white wire (battery negative) of the breakaway case to the existing trailer ground wiring or ground directly to the frame.
4. Connect the black wire (charger) of the breakaway case to the tow vehicle battery hot lead.

I'm good with number 1 and 3, but:
#2, "the existing trailer brake wiring" is what color?
#4 "the tow vehicle hot lead" is what color? The fact that there is both red and black is confusing me.

Thanks, VA

 

[Dr Dave]

Seven terminal RV plugs have a vehical hot wire in them. I would recomend a solor charger instead, for maintaining your battery.

As for your wire colors, you will have to use a test light, try tail, left turn and right, mark each wire, then apply your trailer brake with the controler and find your brake wire. Last wire will be the ground.

If your wiring is not in good condition, you may want to rewire the whole trailer.

Dave

 

[Diamondpilot]

5 wire is not enough. You need 6 pin plug, preferably 7.

Chris