Take the wire connector end where it attaches to the sender, and ground it
to the engine block. If the gauge goes up, then the sender is defective. If
the gauge does not go up completely to the 'hot' position, then either the
gauge is defective, or there is a wiring problem. The gauge can be checked,
with the instrument pod removed, by applying current to the two terminals of
the gauge (two small nuts) on the back side of the unit. Do consult a wiring
schematic, and trace the circuits on the instrument panel, to ensure that
you connect the positive and negative test wires to the correct nuts.

Karl

----- Original Message -----
From: Drew Jenkins <djenkins@BLUESTREAK.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, September 01, 1999 9:56 AM
Subject: 86 Syncro Water Temp Gauge

> The temperature gauge on my 86 Syncro is not working. The needle doesn't
> budge. However, when the
> key is turned on, I get the flashing LED in the temp gauge. All other
> instruments, including all led's,
> in the instrument pod work properly.
>
> I've cleaned the contact at the temp sender and this did not solve the
> problem.
>
> Does anyone have any kind of diagnostic procedure to verify if it is the
> sender or the wiring going to the
> dash console?
>
> I appreciate any insights and recommendations people may have.
>
> Drew Jenkins
> djenkins@bluestreak.com
> http://www.bluestreak.com