Mickeymouse wrote:Mine was built by Southern Ambulance Co. I will try to follow the wires and see if I can tell where they go.
I agree, I want everything to work from the ShorePower and the engine off. In addition, I would like to run some AC items directly from the ShorePower that will only work when the ShorePower is connected.
Don't take this the wrong way, but do you know the difference between a low voltage 12VDC (vehicle) system, and a high voltage 120VAC (house) system? Both are used in an ambulance.
Do you understand the purpose of the Vanner Inverter/Charger unit and what it does?
Most ambulances use 12VDC lighting throughout, but occasionally you will come across one that has a few additional 120VAC lights for checking out the back, and inventorying the supplies when coming on shift.
Shore Power will provide power to 1) The engine block heater, if you have one, 2) the inverter/charger unit, and 3) the remaining outlets not marked 'Inverter'.
The purpose of the 'Inverter' half, which is powered by the batteries, is to change 12VDC current into 120VAC current, and generally you will have one or two outlets market 'Inverter'. These will only have power when the vehicle is running and the inverter is 'ON'.
The purpose of the 'Charger' half, which is powered by 'Shore Power' is to supply 12VDC to the batteries to keep them charged.
Ideally, what you need to do is install a separate deep cycle house battery bank, and split the camping loads from the vehicle operating loads. This is no easy task, even for someone who is familiar with wiring and how ambulance electrical systems are designed.
My advise to you is, unless you know exactly what you're doing, don't mess with any of that wiring. Ambulance system are integrated with each other, and changing or disconnecting one thing can cause something else to suddenly become inoperable.
Anyway, good luck with it!