While the sending unit is out, I would:
1. Confirm that there is power/voltage to the power lead (I think it is a "GB"
wire) that connects to the sending unit, with the ignition switch "on". Use a
voltage meter, not a continuity or resistance or amp meter. Connect the volt
meter to the end of the GB wire & to a good ground. Turn on the ignition
switch. You should see about 12 volts.
2. Connect the GB power wire to the sending unit terminal (with the sending
unit still out of the tank) & connect the mounting flange of the sending unit
to a good ground. With the ignition switch "on", raise & lower the float &
observe the fuel gage. The needle should go up & down.
These two tests should help to isolate the source of your problem.
Gary Hodson
-----Original Message-----
From: Bruce Steele <healeybruce at roadrunner.com>
To: 'Healey List' <healeys at autox.team.net>
Sent: Sun, Sep 24, 2017 3:19 am
Subject: [Healeys] Fuel gauge reading full at all times
After the harness meltdown, which impacted the battery lead to the fuel gauge,
the gauge has read full and there is currently about ? in the tank. The gauge
has been checked twice and pronounced OK. Today I bypassed the tank-sender
wire with a jumper, same result?reading full. I removed the sender and bench
tested the resistance and got 2 ohms with the float fully down and around 70
ohms with the float lifted to approximately where it would be in a full tank.
From what I can find online this is in range. So I?m stumped as to why the
gauge is reading full. Thoughts?
Bruce Steele
Brea, CA
1960 BN7
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