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Not likely...the light sending unit would be no ground untill the engine got to 220 or so then it would go to full ground and THEN peg out the guage.
look in the drivers side of your engine, there should be a green (I think its green) wire going to the side of the head between the #1 and #3 exhaust ports. Follow that wire untill you see it melted to something hot, or cut and grounded on some metal. If you get all the way to the fire wall and see no damaged portions, then you have a ground problem on that wire some place inside the cab.
Chances are it is under the hood though.
Welcome to the board.
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