House Lights not working with hour batteries

I kept having battery issues every couple of months or so. the RV dealer who is no longer in business rewired by MH to keep the draining minimual on my batteries. I didn't think much about it since I did little to no dry camping. After they rewired the rig about five years ago, my house lights will not come on with 12 volt batteries. Work fine with shore and generator power. My vehicle radio will not work unless I have the accessory power switch on. So for now the house batteries only run my vehicle radio and starting the generator.

OK, your cab radio should be running off the engine battery. This is just like any automobile - if you turn the engine key to the Accessory mode, then your radio should work. This should be running off of your engine battery.

If your house lights only work on shore power or generator, then your house batteries are either dead or disconnected. Your converter is converting the 120VAC to 12VDC. When you are not hooked up to a 120VAC source, your converter should automatically switch over to the 12VDC source (house batteries), assuming they are hooked up and not dead.

Depending on your RV, your generator might start from the house battery or the engine battery. In my RV, the generator is started by using the engine battery.

What you should do is disconnect your engine battery at the battery and then discover what does and does not work in your RV anymore.

I suspect you will find with the engine battery disconnected your dash radio no longer works, and your generator no longer starts, and your steps no longer work.

My suspicion is that your house batteries were disconnected from the converter.

Steve