TrailManor Owner's Forum - View Single Post - How does batteries get power from the tow vehicle?

11-14-2012, 08:44 PM

I have a 2007 Yukon with the. GM style 7 pin connector. I checked and I get 13.5 volts to pin #4.

When I plug in the TM I notice that I only get 12.5 volts at the batteries at the tongue. I followed the wire harness from the male plug back along the trailer and only two wires leave the sheath near the tongue and those are two wires that go to the brake disconnect (break away) switch. All of the other wires do to the rear of the the TM and I assume the 12 V power feed wire goes to the power converter and distribution box and then one wire heads forward again to the battery box on the tongue.

I notice when I use booster cables connected directly to the battereI get the "Charging "light in the System Monitor. When I connect the 7 pin connector I do not get a charging light.

I checked all of the fuses in the distribution box. The instruction manual was poor at best.

Does anyone have any suggestions?

11-14-2012, 08:44 PM	#1
Camper One Guest Posts: n/a	How does batteries get power from the tow vehicle? I have a 2007 Yukon with the. GM style 7 pin connector. I checked and I get 13.5 volts to pin #4. When I plug in the TM I notice that I only get 12.5 volts at the batteries at the tongue. I followed the wire harness from the male plug back along the trailer and only two wires leave the sheath near the tongue and those are two wires that go to the brake disconnect (break away) switch. All of the other wires do to the rear of the the TM and I assume the 12 V power feed wire goes to the power converter and distribution box and then one wire heads forward again to the battery box on the tongue. I notice when I use booster cables connected directly to the battereI get the "Charging "light in the System Monitor. When I connect the 7 pin connector I do not get a charging light. I checked all of the fuses in the distribution box. The instruction manual was poor at best. Does anyone have any suggestions?