elecrical instrument wiring

[seniorchristo]

I am rewiring the dashboard of my Plus 2. Are the electrical instruments (fuel gauge. water temp gauge and oil pressure gauge) sensitive to which terminal gets power or ground? I don't see any markings on them. Thanks

[billwill]

I doubt that the slow instruments are polarity sensitive as the active thing inside is just a heater.


viewtopic.php?t=29442&p=195342

[seniorchristo]

Thanks billwill!

[Andy8421]

Bill has pointed this out before, but worth pointing out again -

Fuel and water temp gauges need to have a regulated supply via the voltage 'stabiliser', the oil pressure gauge is fed directly from an unregulated supply.