FWIW,

I've wired AutoMeters in my Mustang in just that manner and they work just fine. They're even all electrical, not mechanical. The only down side is that if you lose 1 hot or ground, depending on where it is, some or all could stop working until you fix the problem, rather than just having a single gauge go down.

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"You might be a king, or a little street sweeper ... but sooner or later, you dance with the Reaper! Yeah, get down with my bad self."