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Easy way to check fuel gauge operation

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Easy way to check fuel gauge operation #1 This topic is about my 1960 Austin-Healey Bugeye Sprite
aebreard Armand Breard Monroe, LA, USA Sign in to contact 1960 Austin-Healey Bugeye Sprite	Topic Creator (OP) May 4, 2024 11:30 AM Joined 11 years ago 255 Posts

Having a problem trying to see if the fuel gauge is operating properly. Gauge shows empty all of the
time, though I just put a couple of gallons in. Armand
aebreard9@gmail.com

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Re: Easy way to check fuel gauge operation #2
davester Dave Diamond Berkeley, California, USA Sign in to contact 1965 Austin-Healey Sprite 1971 MG MGB GT "Dad's Car"	May 4, 2024 12:22 PM Joined 15 years ago 19 Posts

This is an extremely simple system. The gauge is a voltmeter and the sender in the tank is a float that moves a contact across a variable resistor coil. Pull the green and black wire off the back of the gauge and connect the terminal on the gauge to ground. That should send the gauge to "F" or beyond. If that happens then the gauge is working and your problem is more likely to be the sender in the tank. If nothing happens then either the gauge is bad or the hot green wire going to the other side of the gauge is not supplying voltage.

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Easy way to check fuel gauge operation

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