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Ok, let's go with two gauges: one oil pressure and one fuel level. I do not have the sending units from either. I'm fairly certain that the oil pressure one is an electronic signal sent from a unit under the hood. It is not inconceivable that I could get the transmitters but in the end there's only a certain amount of energy I care to expend going down this avenue and trying to find those parts might exhaust that. I can still accomplish most of what I wanted to regardless of the electronics as the 24V thing is mostly going to be disassembled and used for architectural components; it just would be pretty handy to use these two gauges from the unit.

I'm going to be reworking the instrument cluster in my vehicle soon and have some parts from a similar cluster that I'd like to make use of. The problem is that the other cluster is from an old 24V vehicle while mine runs on 12V. I haven't dabbled in electronics much so I don't know if I have any options for using those parts or not. Two things occurred to me: 1. There might be some way I could simply amplify the voltage in those circuits that require 24V (I think there will be 3 of them). 2. My vehicle will be running with 2-12V batteries wired in parallel. Is it possible to run a separate circuit off the same batteries running them in series? I can't put my finger on a reason why it wouldn't work but it just seems kind of wrong. Thanks in advance for any ideas you have.