Thanks to all whom can help. I have been reading some past threads on fuel gauges. I need to know a few answers if possible. I have a 70 Duster. First I tried grounding sending unit wire and got no response on gauge. I pulled cluster. I powered the gauge and it works. Also need to mention the temp gauge is not working. I replaced voltage limiter with one I had. Here are my readings. on one side of gauge it reades varying voltage of around 5v. The other side of the gauge has nothing( according to power probe it shows ground) Using my power probe I grounded the already grounded other side of gauge and no affect on gauge. What am I missing?? I went to LF kick panel and checked connector there and tried grounding dark blue wire and same nothing.