---- William Pugh <anabil007@comcast.net> wrote:
> If you remove the hot (green) wire the gauge should read empty?? Still reads
> full. Correct voltage to the green wire. So b& must be a faulty sensor ??
That is not correct for a TR3. The TR2-3/A/B fuel gauge works backwards to the
later gauges, open circuit (high sender resistance) is full on the early
gauges. If you short the sender wire to ground, the gauge should go to empty.
The other thing to watch for is the ground to the gauge housing. Again the
TR4-6 gauges do not care, but the TR2-3 gauges require a secure ground for
proper operation. Without a ground, the gauge may go to either peg, empty or
full. Although the factory apparently relied on the ground through the
mounting bracket, I advocate adding a ground wire from the mounting stud (under
the knurled nut, preferably with a star-type lockwasher) over to the ground tie
point on the back of the instrument panel.
Same discussion applies to the sender in the top of the fuel tank. I have
added a ground wire from the ground stud on the sender down to one of the bolts
that clamps the tank to the body.
Gauges and senders do fail, but check the simple things first.
PS, I haven't read the entire thread, so my apologies if this was already
covered.
Randall
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