Lost Tach, Fuel, Oil Pressure, Temperature gauges & Blinkers

[MoparThunder]

Took my 68 Charger R/T out for a drive and the Tach immediately went pegged and never went back. Got to the car gathering location and spent a few hours. Then when I left I notices My tach needle bounced to past 8 and back to 0 and stayed there, my fuel, oil, & temp gauges weren't working, plus my blinkers didn't work. I checked the voltage regulator and that seems fine. I looked under the dash and there was a wire loose on the tach so I tightened it up. What do you think it all involves? The voltage limiter? A ground for the cluster? What else would make all that go at once? TIA

 

[pnora]

Took my 68 Charger R/T out for a drive and the Tach immediately went pegged and never went back. Got to the car gathering location and spent a few hours. Then when I left I notices My tach needle bounced to past 8 and back to 0 and stayed there, my fuel, oil, & temp gauges weren't working, plus my blinkers didn't work. I checked the voltage regulator and that seems fine. I looked under the dash and there was a wire loose on the tach so I tightened it up. What do you think it all involves? The voltage limiter? A ground for the cluster? What else would make all that go at once? TIA

About the only thing common between the items acting up is the keyed 12 volt feed.

 

[MoparThunder]

Thanks, unless coincidently 2-3 went wrong at the same time.