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- - Aftermarket tach. (https://www.gmforum.com/oldsmobile-171/aftermarket-tach-295728/)

57lxi

10-15-2010 08:35 AM

Aftermarket tach.

I am looking for an aftermarket tach that would be compatiable with DIS on my '95 88. I have located several OEM insturement panels with the factory tach in in but in looking at my FSM, the panel wiring harness is different with the optional tach.

MouSe

10-15-2010 09:15 AM

Thread moved to Oldsmobile section.

BillBoost37

10-15-2010 09:33 AM

the harness itself?

Jonpro03

10-15-2010 10:57 AM

I got lucky enough to find a wiring diagram for my display on my Turbo Grand Prix. There is a white wire that you can use for the tach signal. Pm RobertISaar and see if he can get you a diagram for your car.

RobertISaar

10-15-2010 12:25 PM

yeah, generally there will be a white wire coming off of the ICM, that's a 1X square wave signal used to drive the tach.

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