Bruce,
There should be 0 ohms resistance between the stud outside the sending
unit and the "close" end of the resistance wire. There should be about
80 ohms (I think) resistance between the stud and the "far" end of the
resistance wire WHEN THE FLOAT IS IN THE TANK EMPTY POSITION.
The circuit is simply a loop from the stud, through the resistor, to
ground (the fuel outlet pipe). The float position determines how much
of the resistance wire is bypassed when current flows through the float
arm wiper.
Hope this makes sense.
Pete in PA
70 LeBaron
Date: Mon, 19 May 2003 10:25:10 -0700 (PDT)
From: Bruce Stubblefield <audiblefeast@xxxxxxxxx>
Subject: IML: 69 FUEL TANK SENDING UNIT
In lieu of paying $140 to have my fuel tank
sending unit rebuilt, I thought I would take a whack
at it.
Inside is a simple rheostat wound around a flat
piece of insulator. This little structure appears to
be insultated from the metal chassis of the sending
unit. When disassembled, there is full continuity
between the wires of the rheostat winding and the
contact screw which attaches at the outside of the
senidng unit to the gas guage lead. Is this right? I
thought that a varying resistance in this circuit what
what the gas guage was measuring?
Any helpful hints?
Back to the Home of the Forward Look Network