After re-reading your post I saw that the sender was 30 ohms. I thought the last year was 63 for the 30 ohm senders. They work about the same however. Also after reading the thread again I thought that the grounding tests were good and it occurred to me after seeing your post 11 test, that the gauge stays where it is when power is removed. By using a separate power source you were able to make the gauge move off full. But now it stays on empty. I think you might have a power to gauge issue or an internal gauge issue.
Have you checked Tom TBones gauge thread for a solution?
http://www.67-72chevytrucks.com/vboa...d.php?t=640615
Quote:
Originally Posted by REDROCKER652002
This is gonna be a stupid question, but is the float intact? Reason I ask is my son's float had a small crack in it, so that was a small part of the overall problem. Also, his was a grounding issue I think. But I would check to make sure the float is not cracked and filling up with fuel. If I am out of line, I apologize. Good luck
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