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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...

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.

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...