If you look on the back of the fuel gauge and notice that the two
connections are labeled "B" and "T", then the gauge itself is probably bad,
as you apparently have the type that should not have the wires switched
around or it will damage your sender, and the gauge should work properly
regardless of whether you are using (+) or (-) ground. Like Frank said,
just make sure that the "T" terminal connects to the sender, not the
battery. If there are no markings on the two terminals on the back of the
fuel gauge, then you probably have the ammeter type gauge, and the wires can
be reversed without frying the sender.
Bob
-----Original Message-----
From: Amy Turner <ltturner@usit.net>
To: Wiedemeyer <boxweed@thebest.net>
Date: Tuesday, June 29, 1999 10:20 PM
Subject: Re: Fuel gauge polarity?....Old Dog, New Tricks
>Wiedemeyer wrote:
>
>> After reading about your experience with frying the sender unit after
>> reversing the wires on the fuel gauge, I just had to find out why this
>> happens....
>
>Can anyone explain to the mechanically impaired (me) why my fuel gauge
reads
>backwards and about 1/4 accurate? Example: When the gauge reads 3/4, the
tank
>is full. When the gauge reads Full, find a gas station! Is my sending
unit
>fried? Do I need to reverse the wires? The car has been switched to
negative
>ground, and I have no idea whether the sending unit and gauge are matched
>correctly.
>
>But, hey, the odometer works as a pretty good fuel gauge.
>
>Amy
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