Hey gang I'm working the bugs out of my almost completed resto on my 69 GTX.I have a temp gauge that does not seem to do anything. I had the whole cluster restored years ago by one of the bigger gauge companies but I don't remember who anymore. Anyway brand new M&H harness through out entire car. Everything else seems to be working great. I know there's a way to test sending unit with test light, not sure how. What's my next move replace sending unit? How do I go about checking the gauge? I hope I don't have to pull the cluster(pain in the butt)I did make sure the main connector was tight.
Thanks
Joe