Truck Conversion & Toterhome Community - View Single Post - Question about 12v system on my United Specialties t/c

Bob86ZZ4 · 04-07-2009, 05:39 AM

Hello again. I just picked up my rig yesterday. Drove it home 270 miles. Loved it. Man does this thing have power. I smoked by a guy with an F350 dually pulling a 5ver up a medium grade hill. I set the cruise at 67 and the most it lost was 2 mph on the hardest climb. Never downshifted of course.

Okay, now to my first (maybe second tho) question. When the generator is running all the 12v lights, water pump, fantastic vent fans, furnace, etc... work. If I shut off the generator everything is dead. There are two 12v house batteries in the left rear compartment. They show about 13.4 volts. There is a large round switch to disconnect them. The switch is labeled with 1=engine, 2=rv. There is a "both" position listed on the switch. There is a Iota ITS-50R auto transfer switch. Also an Iota DLS55 converter. I'm guessing the converter is to charge the batteries and run the 12v items when plugged in to shore power or running the generator. I wonder why the 12v system isn't working without the generator running? It also doesn't work with the truck engine running. I haven't plugged it into shore power yet. I have a 50amp to 30amp adapter. But I don't have a 30amp to 120volt adapter here. I'm going to run over to Walmart today and pick one of those up so I can plug into a regular house outlet when there are no 30/50 amp plugs available. Anybody have any idea why the 12v doesn't work just on the batteries? I'm thinking that Iota auto transfer switch might have something to do with it? My Allegro gas class A has a switch just inside the side door to shut off all house 12v. I can't seem to locate anything like that on this rig. And like I said, when I fire up the generator everything works peechie. I'll call the dealer after they open and ask him too but just in case he has no idea I thought I better get this post going. The whole time I was dealing with him we had the generator on and I didn't know the 12volt stuff wouldn't work without that on. Thanks for any ideas and help. I couldn't hardly sleep last night after being soo keyed up to have this thing parked in front of my house.

04-07-2009, 05:39 AM	#1
Bob86ZZ4 Senior Member Join Date: Feb 2009 Location: St. Paul, MN Posts: 1,819	Hello again. I just picked up my rig yesterday. Drove it home 270 miles. Loved it. Man does this thing have power. I smoked by a guy with an F350 dually pulling a 5ver up a medium grade hill. I set the cruise at 67 and the most it lost was 2 mph on the hardest climb. Never downshifted of course. Okay, now to my first (maybe second tho) question. When the generator is running all the 12v lights, water pump, fantastic vent fans, furnace, etc... work. If I shut off the generator everything is dead. There are two 12v house batteries in the left rear compartment. They show about 13.4 volts. There is a large round switch to disconnect them. The switch is labeled with 1=engine, 2=rv. There is a "both" position listed on the switch. There is a Iota ITS-50R auto transfer switch. Also an Iota DLS55 converter. I'm guessing the converter is to charge the batteries and run the 12v items when plugged in to shore power or running the generator. I wonder why the 12v system isn't working without the generator running? It also doesn't work with the truck engine running. I haven't plugged it into shore power yet. I have a 50amp to 30amp adapter. But I don't have a 30amp to 120volt adapter here. I'm going to run over to Walmart today and pick one of those up so I can plug into a regular house outlet when there are no 30/50 amp plugs available. Anybody have any idea why the 12v doesn't work just on the batteries? I'm thinking that Iota auto transfer switch might have something to do with it? My Allegro gas class A has a switch just inside the side door to shut off all house 12v. I can't seem to locate anything like that on this rig. And like I said, when I fire up the generator everything works peechie. I'll call the dealer after they open and ask him too but just in case he has no idea I thought I better get this post going. The whole time I was dealing with him we had the generator on and I didn't know the 12volt stuff wouldn't work without that on. Thanks for any ideas and help. I couldn't hardly sleep last night after being soo keyed up to have this thing parked in front of my house. __________________ '03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio