Instrument voltage regulator- 1970 HELP

[hurlbird]

Symptoms- Temp gauge to H in less than 1 mile and at 135 degrees (used laser on block). New Ford sending unit and thermostat. No pulse at gauge wire solid light. Volts at gauge wire 7V not 5V. I feel like the IVR is bad but before i open the patient id appreciate any thoughts. Thanks

[Lincoln tech]

As far as I remember you should have blinking 6 volt light , sounds like have open her up doctor and perform IVR transplant.

[rhjanes]

Sounds like the IVR.  When mine failed, the electrical gauges all took turns pegging.  Then return to normal...NOPE, one is headed back to peg again.....wait it didn't make it but here comes the.....  It's a pain to get to on some of the cars.