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Casey Freswick · 07-31-2021, 10:23 AM

I have a Primus IQ brake control unit. When I plug it in not connected to the trailer it says NC for no connection. When I connect the TM to the TV it says SH for a short in the system. I have disconnected the wires at the wheels. I have checked the wiring from the harness to the where the wires split to the two wheels. That wiring is good. (I connected the the positive wire at the split to another wire which I ran back to the trailer plug and tested continuity. There was no short in this wire. Same for negative). I then reconnected the wires to the drums: Short in System. Any suggestions?

07-31-2021, 10:23 AM	#1
Casey Freswick Senior Member Join Date: Sep 2016 Location: Grand Rapids, MI Posts: 204	Short in Brakes I have a Primus IQ brake control unit. When I plug it in not connected to the trailer it says NC for no connection. When I connect the TM to the TV it says SH for a short in the system. I have disconnected the wires at the wheels. I have checked the wiring from the harness to the where the wires split to the two wheels. That wiring is good. (I connected the the positive wire at the split to another wire which I ran back to the trailer plug and tested continuity. There was no short in this wire. Same for negative). I then reconnected the wires to the drums: Short in System. Any suggestions? __________________ Casey. TM:2006 2720SL TV: 2014 Yukon 300 Watt Solar, 300 Amp lithium, 3K Inverter [SIGPIC][/SIGPIC]