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Great news! I changed out the switch and bingo, dash lights up. Along with my Sunpro and Hurst Promatic base, (Which I forgot lit up). On to the next little problem. Thanks for all of your help guys...

Thanks for all your help so far, guys. I've got a new headlight switch coming in tomorrow, so I'll let you guys know if it fixed the problem.

Yeah, it's an aftermarket shifter and there's no radio in the dash. I was in my garage while doing this, so daylight isn't an issue.

Wouldn't know, I have a Hurst Pro-shift and it's not lighting up, the heater switch doesn't light up well enough to see anyway, and the factory radio has been deleted.

Headlights and parks still come on, still possible faulty switch? It is apparently 40 years old.

Here's the deal.. '72 Dart Instrument cluster issue -Copper runs are clean, bulb sockets are clean, bulbs are good, Voltage Reg is new, all ohm and continuity checks passed. -Main dash harness connector is clean and tight, continuity from connector ends to farthest end of copper run is...

I changed the instrument cluster voltage regulator, although the one on the firewall had been changed recently by the previous owner.

Old voltage regulator: Key ON: Fuel reads half Temp reads 120 Engine ON: Fuel and Temp Peg all the way to right New voltage regulator: Key ON: Fuel reads empty Temp reads -120 Enigne ON: SAME. Tested gauges and sending units, both check good. Dash ground good, connections good. WTF?:angry7:

Can anyone tell me what exactly the instrument cluster voltage regulator is supposed to do? With the old one in, my temp and fuel gauge peg to the right, with the new one, their both dead sticks. Cluster ground is good, can't figure it out.

Well, I don't have all the screws in, because I don't have all the screws. Like I said, it worked before. It's a friggin' mystery to me right now. Is there someway to test the limiter?

It's not dangling, it's been completely reinstalled. Where is it supposed to ground to the chassis at?

So, I bought this Dart from this nice kid who I'm now figuring out knows as much about auto electrical systems as my cat. Aside from the gremlins running through my car's electrical system, I've decided to tackle the dash first... He bought a instrument cluster voltage regulator that plugs into...