Military-Vehicles: Re: [MV] M-37 Gas Gauge

Re: [MV] M-37 Gas Gauge

Gil Huguley (Gil@huguley.com)
Tue, 19 Aug 1997 19:19:05 -0700

I think it is the sender unit. When the tank is full, the resistance to ground should be maximum, causing maximum deflection of the needle. When you ground the wire you disconnected from the sending unit does the needle go toward empty? Since the needle can deflect through its full travel, it must be a bad resistor in the sender.

Anybody else have any better knowledge? I have an old Motors Manual that describes several different types of gas tank gauging systems. Does anybody know for sure what type we are dealing with here? It would depend on what type you have as to how it should work open circuit or grounded.

for what its worth,

Gil Huguley, MVPA17957
Methow, WA, USA
'53 M37

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