Does anybody happen to know anything about the electrical systems in old ambulances? Specifically a 1998 Ford f/e[?]350 conversion van with an ambulance system by Wheeled Coach/Rev Group of Florida? Thus far I've been completely unable to find documentation or even a perfect match on a model, but through dicking around with a 12v jump box grounded to the chassis, some ghetto-rigged jumpers, and the cut 80+ wire loom I've managed to get power to everything in the rear interior off battery (always on, they ripped out the switch panel before sale so we're going to have to make a new one) and jump some of the exterior lights on temporarily. Really looking for a wiring diagram if possible, they're labelled on the loom but not clearly and I'm not familiar with what all of these devices are called. Ideally I'd like to have flashers and sirens working just for shits and giggles.
oh and the horn
I made the horn work too, but not off the button on the steering wheel. If you put 12v to it the horn works, the aftermarket ambulance kit has the factory horn run through their loom for some reason. So we'll probably just put that on a switch too for the sake of simplicity.