temp gauge not reading?

Tim check the gauge also. Disconnect the wire that is on the sender,give the gauge power and ground the wire you just disconnected from the sender. If the gauge and wiring are good you should get a reading on the gauge.

Welcome Tim. It could be either one.Make sure you have power to the gauge. If you don't then start there. If you have power, disconnect the wire to the sender and ground it.If the gauge is good it should peg the needle,and you need to change the sender.If it doesn't, the gauge is bad or the wire to the gauge is bad,but you already checked that. Some gauge manufactors don't want you using teflon tape or sealer when installing the sender because it messes up the grounding of the sensor. Give this a try and get back if you need any help,but be warned most are headed to the Green Lake reunion this week where most will be boating, skiing and drinking (not necessarily in that order ) and answers will be slow-