Question about instrument voltage regulator

berlins said

I put the solid state relay in my 67 instrument panel also. On mine I had issues with the left turn signal light. I added a ground wire to the tab on the solid state relay and grounded it to my dash. Might help your problem also if it comes back since gas and temp gauges are on that side of the cluster.

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Think I might try your suggestion before disassembling the cluster.

I didn't get around to checking the grounds on the instrument panel. It started acting strange and the symptoms are what people have been saying are ground related. This morning when I turned the headlights on the fuel and temp gauge stopped working and the left turn signal light came on about half bright. The gauges work when the lights are off but I see the solid state regulator going into protection mode once in a while, killing power, then it comes back. New regulator protects against over voltage with bad grounds. Well it is over 40 years old.