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Old 10-15-2010, 09:35 AM   #1
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Default 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.
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Old 10-15-2010, 10:15 AM   #2
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Thread moved to Oldsmobile section.
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Old 10-15-2010, 10:33 AM   #3
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the harness itself?
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Old 10-15-2010, 11:57 AM   #4
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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.
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Old 10-15-2010, 01:25 PM   #5
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yeah, generally there will be a white wire coming off of the ICM, that'* a 1X square wave signal used to drive the tach.
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