Thank you David! This information is Gold !

Sent from Yahoo Mail on Android 
 
  On Sun, Aug 12, 2018 at 5:40 PM, David Beierl<dbeierl@ATTGLOBAL.NET> wrote:   >
> With the temp gauge disconnected entirely, I either get the blinking at
> startup and then no blink (and no reading for dash temp), or I get the
> blinking at startup, with a temporary pause, then the constant blinking
> with a hint of temp gauge movement.
>

Second condition says you have the newer level controller and it has
triggered.

> Am I correct in thinking that there's a short in the wire somewhere from
> the pressure tank to the dash gauge?
> Like that wire has worn against metal and is making contact?
>

No, if the sender line were grounded the controller would think everything
was fine.  The controller triggers when it's an open circuit between the
sender lead and ground.**

Bad contact at sender,
bad ground at sender,
bad contact at connector T7a pin three (green wire going to blue/green;
inside wiring box on the firewall;
broken wire,
bad contact on fuse/relay panel pin K5 (pinout on Bentley 97.68),
bad contact at level controller, painted number 42 or 43, third socket in
the upper row of the fuse/relay panel,
broken solder inside level controller.

Yrs,
d