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TR3A Electrical Problem - Fuel Gauge

To: "Triumph Digest" <triumphs@autox.team.net>
Subject: TR3A Electrical Problem - Fuel Gauge
From: "John Edwin Pike" <toadhall@pnc.com.au>
Date: Tue, 12 Dec 2000 09:35:56 +1100
Gentlefolk,

I am returning to this list after a longish absence, and have a query for your
combined minds.

The fuel gauge in my 3A reads "full" until I've used around 3/4 of the tank.
The needle then comes off the stops, and acts as though the total capacity is
around 3 gallons.  That is, when there's about 1 1/2 gallons left the gauge
indicates "half", and when the tank is empty that's what the gauge reads.

Being somewhat electrically challenged, my trouble-shooting to date has been
to remove the sender unit, clean the contacts on the resistor, and clean the
various earth contacts. None of this has made any difference.

Problem:  How do I convince the gauge that the tank capacity is actually 12
gallons? And do  I have a problem with the gauge, the sender or the wiring in
between ??

Any assistance will be greatly appreciated.

John Pike
TR3A TS 75053 O
Australia

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