Re: [Tech] Tach needle bouncing....88 16v Rocco

[Brian McGarvey <brianm@zbt62.eastnet.gatech.edu>]

On Wed, 7 Feb 2001, S.Coleman wrote:
I have not specifically had this problem, but my guess is grounding
problems. Insert EE circuit theory here. i can get detailed if you want.



> OK,...can someone tell me the "short and skinny" as to *how* the tach moves?
> Mine seems to be working fine,...except at idle. ( i.e..  stop lights)
> Then it starts bouncing around.  Another part of this mystery is this:
> when I put on the turn signal,...the tach kind of "jumps to the beat" of the
> turn signal .......up...down,.....up ..down........
> Ahhh right,.....enough up, down,....seems that the coil gives the tach the
> signal via wire that plugs into one of the two harnesses that connect to the
> cluster,...but I'm not sure.
> Thanks in advance,
> Chris
>
>
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