Thanks for the replies. I did disconnect the plug from the motor and harness. Checked voltage coming off motor and I have 12v so I am assuming it is in the harness that goes to the gauges. When I plugged it back in, my tach gauge actually showed some signs of life. I will keep you posted on what I find in the end.

I tested the gauge as per instruction. Disconnected sender wire, turned on power gauge went to empty. Then jumped the sensor to ground on gauge it went to full. They say the gauge is good if that happens…

My issue started as an empty tank reading as 3/4 full. Replaced the sender and it still reads 3/4 full at empty. Found that out the hard way…Ha Ha.

So I think it is a wiring issue as well. Just looking for where to start.