Finally got some time to work on the truck today. Gauge still showed empty when ignition is on. I ran a jumper cable from the sender to the resistor and it showed empty with ignition on. I noticed the resistor was bent at a 90* angle so I straightened it and the gauge went to full. Actually it went as far past full as far as it could go. I decided to take the resistor off and it pegged past full again. Could it be a bad resistor?
Ohms at the sending unit are around 20. Ordered a new runtz resistor that has a ground cable just in case.
Any ideas out there?
