Temp & fuel gauges - what am I overlooking?

Uncle Bob said

I went ahead and ordered 3 100 ohm varistors to make a test box as per that video I posted above.

Click to expand...

Great tool to have around. Use it with the chart that 67Dart273 posted.

I'll be interested to see close up pics of the circuit boards. Also the results of testing the gauges removed from the cluster completely.