Originally Posted by Mike Romain
No, the fuel gauge has a voltage regulator in it that feeds both the fuel gauge and the temp gauge.
You could hook up an electronic 5 volt regulator to just feed the temp gauge I guess, but the voltage going back to the fuel sender might be an issue. The fuel sender is expecting to regulate 5 volts to ground, not sure what 12 would do to it or the readings the gauge would see back.
Not realy sure what you mean there Mike. The Fuel sender doesn't adjust the regulator. ?? Well it kinda does but not realy. The regulator realy does not set a certian voltage, it regulates how much current is delivered to the system IF the sysem needs more power then the pulses get longer, if it needs less current then the pulses get shorter. Pulse width is effected by input voltage and temperature. Pulse height is 12 volts.
Maybe he's talking about an aftermarket gauge that fits in the speedo but some of those only run on 12 volts also.
A couple of the Aftermarked direct replacement gauges seem to be calibrated for thier own constructions and may not work with the OEM gauge. That's one of the reason to replace them in pairs.
If you had a lot of time you could probably adjust the fuel gauge to work properly with the temp gauge. You would have to first adjust the regulator on the fuel gauge to match the temp gauge and then adjust the Full scale and 0 adjustment on the fuel gauge.
The regulator adjustment on this aftermarket gauge is on the left thru a hole in the case. The other adjustments are noted.