Originally Posted by BlackJohn
That is a really nice whatever! it's a 12v system at any rate and most likely in that location for ease of access for maintenance. What it controls is another issue tho.
could be lighting, door alarm systems, backup alarms, stop sign or other such as speakers or PA system.
Have you tested any of those fuses to see if any are hot? if so what is working and what isn't on the bus?
I wouldn't assume anything about that and definitely would secure it again from bouncing around. Does it have a panel cover at all? If it is a live panel try unplugging those brown junction blocks on the bottom and see what you loose but definitely don't change any connections at this stage.
Yea that's exactly what it does (control the safety stuff). I just don't know the proper name, nor if it actually does anything for standard vehicle function such as turn signals, reverse light, etc.
The brown plug on the left has wires going back to the tail lights, and the one on the right I believe goes to the STOP sign and other front features. I have snipped off all the wires going into the left plug that went to disconnected rear bus-specific features, and all that is left are the turn signals, tail lights, backup light, and brake lights. Unfortunately the plug on the right sends wires down into the dash and front, which is a lot harder to trace than the ones that went to the back.
My *guess* is that it's basically doing nothing - and that none of the fuses, relays, blinkers, etc. are doing anything useful, since the bus has had it's control panel removed along with all bus-specific lights and devices.
Time, as suggested, to just trace the wires and see what does what. I just thought maybe someone had already done a similar "de-schooling" of their bus and dealt with this.
For reference, here's the pile of "did nothing" wires that went to the back...
And here is the pile of hydraulic and other hoses that also went to the back...
Interestingly the hydraulics connected to nothing in the back, ran all the way to the engine area in front, and connected to nothing there either. The wheelchair lift previously in the bus was electric - no hydraulics. Maybe it was run by Collins as an option in case someone wanted to use it in the future?