75 Instrument Cluster

[bbreedlove84]

Installed new instrument cluster in my 75 bronco. Wired up per diagram and previous instrument cluster. My temp gauge and oil pressure gauge are reading max. I know that is not accurate. Any idea why? New gauges, new sending units.

 

[DirtDonk]

Did you also paint the dash by any chance? Paint any other components?
Is the instrument voltage regulator screwed to a clean point on the back of the cluster where it supposed to go?
The maxed out gauges kind of smacks of a lack of grounding.

 

[bbreedlove84]

That is what I was thinking. A grounding issue. It’s not painted on rear. Came right out of the box from Tom’s bronco with new screws and a new voltage regulator.