IFRC, the temp sending unit works as a variable resistance ground. Remove
the wire from the sending unit and ground the wire. If the needle in the
guage moves to the other side, the sending unit is bad. If the needle
doesn't move, then the problem is either the guage or the wiring.
-----Original Message-----
From: Dan DiBiase <dibiase@home.com>
To: MG List <mgs@autox.team.net>
Date: Monday, March 06, 2000 12:33 PM
Subject: Non-Functioning Temperature Gauge
>My 76 B Roadster has a non-functioning temp gauge. In investigating
>this, I noticed that the sending unit in the engine has 2 wires coming
>out of it, both green. One wire goes into a bundle headed who knows
>where, and the second has a female connector on it and is currently NOT
>connected to anything else. My car has had all of the pollution controls
>removed by the PO, so not sure if this extra wire was hooked into that
>somehow..?
>
>My questions - could the second wire have anything to do with the
>malfunctioning gauge? Should I replace the sending unit to determine
>whether that is the cause for the problem?
>
>TIA...
>
>Dan D
>Dayton , NJ
>76 Brooklands Green B Roadster
>
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