Originally Posted by oakprk
Does anyone know what voltage should be on the tank sensors when the tank is full and empty?
Here is what I have on the sensor array. You would need to do the math to calculate a voltage from your actual battery voltage and the drop across the individual resistor pack.
A Full indication is zero ohms (short circuit) so zero volts read.
An Empty indication is resistance above 188K Ohms, so voltage read would depend on input voltage.
ANY probe shorted to ground (the white wired probe) by slime, hair, or crud touching the tank walls will read a full tank.
See my review on Horst Probes here Horst tank Probe Installation
And a film of why you need to upgrade your probes here:
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW