I installed an Autometer mechanical water temp gauge today and it doesn't want to work. It lights up but the gauge itself does not measure temp. I used the clock wiring harness for the 12v ignition power source for the light on the gauge and the gauge sender 12v source. I used the ground from the clock harness to ground the light on the gauge and grounded the gauge itself on the thermostat ground as the instuctions say to use a ground close to the temp sender for whatever reason. It lights up BUT does not read temp. Any ideas???? Perhaps a better ground for the gauge. Please help!!!
THanks

 

Anyone???

 

Did you put the probe in too a coolant source? You said mechanical so i assume you have a themocouple that needs to go into a coolant source.