You need a +12V supply. Remember, the sending unit is just a variable
resistor (the resistance changes with temperature), and the gauge is
simply an ohmmeter in series.
In other words, its: +12V ---> gauge ---> sender ---> ground.
In this case, ground is the engine, where the sender is screwed in to.
You can probably get +12V from one of the green wires on the dash
harness. If you have a Haynes manual, you can double check against the
wiring diagrams for the '78 and '79 Midgets.
Hope this helps.
-=Chris
Chris King
http://home.comcast.net/~kvcbk/
<-----Original Message----->
From: Gregory Groiss
Sent: 8/14/2006 1:59:40 PM
To: spridgets@autox.team.net
Subject: Temp Gauge Wiring
Hello All,
On the back of the electric temp gauge there are two terminals. One
goes to the sending unit in the head and the other goes to ???? Is it
a ground? Also, neither post is marked what wire goes to what post? I
am switching from the manual temp gauge so I have no reference point.
Thanks,
Greg
'73 Midget (partly painted with a touch of orange peel)
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