Needing a wire diagram/color chart

[Richard Blackwell]

Having an issue with replacing old electric drum brakes with electric over hydraulic disc brakes. Wires got separated inadvertently in the "J" box on the front pin. I now have an orange/blue striped wire that is somehow receiving 12VDC+ from the trailer battery that I can't determine to what other wire(s) it should be connected. I've accounted for brake function and for the break-away switch functions and everything else on the rig is operating...but somehow I now have an "extra" hot wire that I cannot determine where it should be hooked up with...and of course no help from Keystone on this 2013 3402RL of mine. Got a copy of the Keystone RV "12V DC Wire Standard which doesn't even list an orange with blue stripe (or blue with orange stripe) wire in the "standard" list???

[rohrmann]

The battery should be providing power to one side of the breakaway switch, and I think that blue wire is the one providing power. The other wire is orange with a black stripe. I guess either one is the hot wire, and when the switch plunger is pulled, they are both hot energizing there brakes.

[Richard Blackwell]

Thanks for that...I already have that break-away circuit isolated out and a power source wire to one side. That orange/blue wire has 12vdc on it also and we can't determine to where it belongs. If I could locate an accurate wire diagram for the trailer I could try to get this straightened out...tried using a "toner" to trace where the wire goes but it apparently is connected to a circuit board or other electronics as the "toner" ceases to "tone" whenever attached to that wire...it's currently down to physically trying to chase down the destination/source for that wire.

[GAinaMontana]

You will love those disc brakes. One question, is your truck hooked to the trailer when you are testing? There is a 12v feed to the j box from the truck when connected. On my 2014 3402rl, the wire bundle from the j box enters the battery compartment in the upper DS front corner. If that orange/blue wire is in that bundle it should be traceable from there. If you are installing a Hydrastar actuator be sure to ground to the truck thru the j box. Grounding to the trailer frame did not work for me.

[Richard Blackwell]

No on hooked to the truck...going to try the manual tracing today hot weather permitting. The system is a "Titan", and it is grounded through the wiring in the "J" box.