I agree, the only way I can think off is if some control units
superimposed a signal that was ignored by the gauge. If the rain stops
long enough to dry the ground I will unload the stuff from the rear of
my 87 and see how it behaves. Then I will look at the control unit.

Mark

David Beierl wrote:
>
> >Mark wrote:
> >My 83.5 would blink the led with a low level in the
> >tank but the gauge would stay put.
>
> It seems to me that that this *could not happen* with the wiring as
> described.  Can you think of a way to influence the light and not the
> needle, given only one input terminal to the gauge?  All I can think of is
> superimposing some sort of AC signal on the DC...seems far-fetched somehow.
>
> Thoughts?  ISTM we need to find one that behaves the other way and trace
> the circuit etc and find out what it's really doing...
>
> david
>