Well I am giving up on the LED console from the 85 for the fridge light. I dont use the water tank level and already have a digital volt meter for the battery. 

So I am trying to build a volt meter or rather convert a small analog 12vt meter over to be able to read the very small current the thermocouple produces.

The standard volt meter that is 1-15 volts radio shack sells uses a coil on the needle and a resistor. 

Anybody know what resistor a standard analog meter would use to measure the very small 12 millivolts that the thermocouple produces. or a range for measuring it. 

My multimeter will measure it but I cant seem to determine which exact resistor its using. It may be 156K if that sounds close.  

Any help will be appreciated. I am just trying to get an indicator of the fridge being lit. 

Thanks

Doug in Calif