69 Instrument Cluster not working

[demon69]

Hi
My instruments are operating intermittently, when I start driving they seem to be working okay but at times all the gauges go to zero, ie, oil pressure, temp, fuel.

Any ideas?

Thanks
Peter

[peter9231]

Voltage regulator on the back of the dash is "juicy fruited"

[demon69]

Thanks Peter, what's your confidence factor that the reg is stuffed??

[67FBGT]

Good idea to replace the 50+ yr old style regulator with a modern solid state one.

But thoroughly check the earth connections for the cluster seeing as the issue is intermittent. I'd do that first up.

[jiffy]

Agreed - more likely to be an earthing issue rather than a regulator issue - easy way to check - at night when the lights are on, do the dash lights go out/back on at the same time?

[Juanball mustang]

Alright , my guess is the printed circuit board .

[peter9231]

Thanks Peter, what's your confidence factor that the reg is stuffed??

100%

[pmb0186]

agree voltage regulator or wire to or from.
the 5v produced from the reg powers the gauges and that all gauges are effect indicates common item.