Supreme Getaway wiring diagram and mystery switch box

Solar regulator ? switch possibly for momentary test of battery status ?

I'm more concerned looking at the circuit breaker top right with no protection against shorting.

ideally all electrical equipment like this should be isolated in its own cabinet/space to prevent accidental damage/shorts

Imagine what might happen if a metal jacket zipper or clothes hanger was to come into contact with circuit breaker

Bill D
That blackbox look remarkably similar to ones I have and purchased from Jaycar.
It does not look to be std equipment at all and bacre connections as mentioned above is not a good idea either. Some protection against shorting should be provided.

Do you lnow what the wire connector block, along side the black box, does?
Some probing with a multimeter may be required to ID the source and functions of the box, switch and other wiring present.
Probably is to do with battery charging OR supply to some additional function fitted to the van.
Can you find similar/same colour and size wires anywhere else and what they connect to, That may give a clue as to the purpose of those items.

Gday Bill,
My guess is that its the old fashioned water tank gauge. Usually a momentary switch at the top and 3 LEDs indicate the level. Our 2003 Tvan has something similar.

And for not much extra you can buy insulated coathangers :-)
Enjoy your van!!!

Cheers
Phil

Thanks for all your thoughts, folks. When I get a bit of time, I'll get the multimeter out, pull the cover off the box, work out where the wires go and cover up the exposed connectors. I was just hoping that someone might have seen something similar on another van.
You've got me thinking about after-market additions and the only obvious one is a reversing camera so I'll check around there first. The previous owner didn't seem to know much about it.
Phil - I knew I'd never get away with a post on ExplorOz without a reply from you within 24 hours, but I don't think it's a water-tank gauge as I've emptied the tank and the lights at the bottom of the box still flash randomly. Plus why would someone put a gauge at the back of a wardrobe? Mind you, we've both seen sillier things on caravans. Worth further investigation.
My granny used to knit insulation for coathangers.
Bill

Ya thunk there are actual diagrames for this stuff ... even the factory wiring .... ?????

Mystery solved. The previous owner eventually recalled that it's a switch which disconnects the feed from the tow vehicle to the van batteries. That is, it has the same effect as pulling the Anderson plug out. The flashing lights are just to warn you that the car's cranking battery is draining if the switch is left in the on position while stationary.

I know, I know - you'll all be saying: why not just put an isolator in the line and why hide the flashing lights in a wardrobe?

The answer is, it was a job done by some cowboy on an otherwise excellent little van. If you could see how poorly the batteries are fitted, you might understand. There's no fuse between the batteries and the Anderson plug on the drawbar, the extra battery is tied down with a frayed old strap and there is no BMS whatsoever. Both batteries are in the front boot and the van was built with only one so the second, after-market battery has increased the ball weight unacceptably. There is no negative wire as the cowboy used the chassis.

The plan is to relocate them under the bed, just forward of the axle line. They'll get strong cradles, a Redarc BMS and ammeter, and proper fusing and cabling. If they've been buggered by over-charging, they'll be replaced with Full River AGMs. A nice little project.

Thanks to all who replied.

Bill