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First make sure the batteries are in good condition and you are seeing 12 volts at the batteries. Next when you hit the house dis-connect switch inside you should be able to hear a solenoid clicking over. To troubleshoot this type of condition a 12 volt test light will help. This unit should also have a converter that takes the AC voltage and turns it into 12 Volts DC. These are normally wired into the breaker panel OR on a outlet it plugs into. Make sure no GFI'S are tripped inside and outsside of the unit. Also check the converter and make sure no fuses are blown on that...With the test light you can probe for power going to the solenoid for the house battery dis-connect, some solenoids have a fuse located on them make sure that is good. IF you have power on one side, but not the other you can try tapping on the solenoid.... HERE is a print that will show you locations of the components. Look like the converter is near the fridge...
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Just to be sure after I read your reply, are you getting any 12 volts in the coach? IS the AC portion working when plugged in such as the TV and Microwave??
I am back and missed your reply... My name is XXXXX XXXXX X know from being in perry GA at the FMCA about fire ants first hand bad stuff....
Normally an RV will have a Inverter OR a converter. Looking at the print it looks like you have a converter. When the coach is plugged in the converter takes the incoming AC voltage and makes 12 volts dc for your lights and all your systems. IF you also had an Inverter you would be able to uses your AC appliances and sockets traveling down the road. When you unplug from shore power you are just getting your 12 volts from the battery no converter. With that said most set ups like this are required by code to have an auto breaker on the main positive with in 18" of the battery.. (something to look for) I was also under the impression that the converter in this unit was under the fridge, might have to remove a panel to see it, other locations could be under the bed or behind the breaker panel. The solenoid for the house items appears to be under the front engine access, there should be a bunch of electrical stuff in this area.... I wanted to catch you, I know it is getting late. Please look at the print I sent and I will see what else is available. please only hit ACCEPT when you feel I have been helpful...
Thanks, Robert (RJ)