----- Original Message -----
Sent: Friday, July 27, 2001 1:06 PM
Subject: Light problem
Hi Timothy,
Just saw your notice. I also have =
an 84 that
has had a history of this problem. You will find much discussion =
of the
problem on the server.
There are four parts to the =
system. There is
a plug in module located on the left side of the chassis under the =
dash.
There are one or two more modules also plugged in there. The other =
part of
the circuit is made inside the temp gauge itself. In addition, =
there is a
10v regulator that plugs into the ribbon that connects the instruments =
in the
dash. It looks like a transistor with three wires. The last =
part is
the two electrodes which insert into the water tank.
You will find that some people say that =
there
problem was caused by a leak in the gasket under the electrodes which
allowed water to leak shorting out the wires giving a false
resistance.
I have personally been through two =
replacement temp
gauges and one replacement module and one replacement electrode and I am =
using a
separate 10v regulator I made. Things worked great for a while but =
now I
have the same problem. My problem is that the light stays on all =
of the
time at times and at other times doesn't come on at all.
The light should come on and blink when =
you first
start, then go off. This checks out the system. =
I am going to try solving the problem =
myself when I
get time. Modules and gauges are expensive. It would be nice =
to have
extra ones to try and exchange to see what causes the problem.
Oh, the system works by sending a low =
water signal
on top of the temp. signal using the same wire. That's why the =
integrated
circuits are needed. Sure would have been better to use a separate =
system!
Let me know how things turn out. =
Maybe we can
solve this problem together. I am going to be out of town Sunday =
through
Wed. of next week. I will check back with you.
George
Cataula, GA (Near Columbus, =
GA)