Been slowly working on getting this ready for the ski season which starts on Nov 28th for us. Got out for a test night in it last weekend. The bed was nice and the kid liked his bunk. One thing I dint think of was disabling the door light activation switch, the lights are bright in the middle of the night. I now have a switch to disconnect the door activation switch. Going to try and get the diesel heater installed this week. And I haven't figured out how to get all the electrical to stay on when the ambulance isn't running. Turning on the ambulance connect when the engine is off activates a few circuits, but the rest only come on once it is running. Any help on this would be great.
The oil pressure switch which makes it so the high power drain accessories only get power when the engine is running essentially connects that prong of the relay to ground when there’s oil pressure. If you instead connect that prong of the relay to a steady ground, then you’ll have power to those circuits whenever the ambulance connect switch is on. The down side is that you can potentially drain your house batteries with those accessories, but if you converted your inside lights to LEDs that’ll not happen any time soon.
In my case, the oil pressure switch stopped turning on those circuits shortly after I got them all working. I subsequently determined which of the large (oversized) relays energized the house circuits. I then turned the ambulance connect switch on, connect a wire to ground, and then tapped it to the terminal on the relay to confirm it would turn on the circuits that weren’t getting power.
I can’t remember exactly what all I needed to change, but in the end, I had a fused wire going to one side of the relay, and the other side going to ground. If I remember correctly, the ambulance connect switch is on the ground side. If the switch is off (open) then no ground connection to the relay & on (closed) then the relay energizes those circuits.
If it would be useful, I can send you schematic diagrams for a 2001 Crestline. I sorted mine out before getting the diagrams, but I’ve been told that they are very similar for the different years. PM me an Email and I’ll send them to you... if I haven’t already, I can’t remember who sent me them... but thanks again if you happen to read this. ?