Help! My 760 Gauges are on the fritz

[RollinCole]

Hello all!

1984 760 D24TIC.

I have been having issues with instruments. I have had my oil pressure and level lights flashing at random (UPDATE: this is now fixed, replaced whole engine harness with new) however, at random, my fuel and temperature gauges will drop to zero as if they have lost ignition power. I've tried to isolate the scenario to a set of circumstances but it seems pretty random. I did have some blower motor issues, and I did replace it and for one full day of driving, I had no issues with the gauges, strangely. George, if you're reading this, this is the silver car-- everything behind the dash looks brand new, grounds included.

Does anyone know where the fuel/temp gauge get ignition power?

Thanks!