mjr46

I tried that method on my 85 when the unit went out just for giggles and it still read a resistance value through the whole range but was way out of spec.. I have a special MAC tools GAUGE tester that allows me to test the IVR...verify wire integrity and has dials to punch in resistance values....or if you have acess to a decade box.. that'd be the proper way.....or if you know what resistance values make the gauge read empty and 1/2 vs full...go to radio shack and buy some resistors and plug them in series and see if you can get the gauge to read correspondingly..or groung the sending wire and gauge should peg full