BBB66 wrote:
I start it every couple of weeks, run it to normal operating temp etc.
Mike
Mike, I think you have multiple problems. First, how long do you let it "run to normal operating temp"? If it is not for 45-60 minutes, you may be running your own battery down. Every couple of weeks is actually quite often. If there is a radio switch on the dash and it is on, this is attached to the chassis battery and adding to the draw. This is not the on/off of the radio. I always make sure my radio switch is off when not actively using the radio.
The crossover switch not working could be a solenoid, which connects the house to chassis batteries. Look at that as a different issue. If you choose to work the cross over first, then get a volt meter and test your house batteries and then the solenoid.