C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Aftermarket Tacho hookup '87 ??

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Old Jul 14, 2005 | 03:32 AM
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rodj
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Default Aftermarket Tacho hookup '87 ??

Where inside the car is the best (easiest) place to get a signal wire (the green one on most tachos) for the tacho?
What colour is the wire?
Am I correct in believing that I want the pink wire from the coil as the signal wire?
87 L98
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Old Jul 14, 2005 | 06:51 AM
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From: Baltimore, MD USA
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If you look on the driverside/bottom edge of the distributor cap there are two push on connectors.

The Pink wire is 12 volts (Battery)
The White wire is the Tach. Signal.

If you pull the dash cluster out there are two connectors on the right side of the cluster. One of them is a 32 pin connector.
(Two rows of 16 pins).

Looks like this.

C16 Pink/Black-----------D16 Pink/Black
C15-----------------------D15
C14-----------------------D14
C13-----------------------D13
C12-----------------------D12
C11-----------------------D11
C10-----------------------D10
C09-----------------------D09
C08-----------------------D08
C07-----------------------D07
C06-----------------------D06
C05 White Tach Signal---D05
C04-----------------------D04
C03-----------------------D03
C02-----------------------D02
C01 Tan------------------D01 Black

Splice into the White wire, pin C5 for the Tach. Signal.

Last edited by Hooked on Vettes; Jul 14, 2005 at 06:57 AM.
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Old Jul 14, 2005 | 07:19 AM
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Thank you sir.
God I love this forum.
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Old Jul 14, 2005 | 09:56 AM
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From: Robert Lee Texas
St. Jude Donor '05-'06
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Thanks.... project coming up on a '91..... my mind was still undecided on a course......
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