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71GMC_3/4T · 06-11-2003, 11:54 AM

You should have a brown wire running from the fuse block terminal to the sending unit on the tank. The tank should be grounded due to the way it is mounted.
If you ground the brown wire, your guage should move to empty. If it is open, the guage should go past full.

06-11-2003, 11:54 AM	#2
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	You should have a brown wire running from the fuse block terminal to the sending unit on the tank. The tank should be grounded due to the way it is mounted. If you ground the brown wire, your guage should move to empty. If it is open, the guage should go past full. __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO