Steve,
Re: the erratic behavior of your tech depending on electrical load. I would first
suspect a poor ground somewhere. If you have access to a sensitive voltmeter (like
a high input impedance digital voltmeter) probe between the grounded battery
terminal and chassis, between chassis and ground wires, etc to find the bad
connection. Or you can inspect the obvious choices.
Good luck,
-Roger
Steve Robbins wrote:
>
> I have several problems with my tach. First off it reads about 1500 RPM
> too high for the speed. Secondly, it sometimes just bounces from pin to
> pin..back and forth. And then sometimes it does not work at all.
> BTW it seems that electrical load has some effect on it also. Like,
> switching the lights on will change its behavier. Really weird.. Any
> Ideas?
>
> Steve Robbins
> New Albany, MS
> 1965 Series V
> B395000767 LRX
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