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73-87 Chevy _ GMC Trucks => Interior & Equipment => Topic started by: Low87c10 on May 31, 2010, 06:53:23 pm

Title: Factory Tach Swap into an 87
Post by: Low87c10 on May 31, 2010, 06:53:23 pm

I have an instrument panel with the factory tach that I'd like to put into my 87. The panel is all electric, and I know that I will need to use the original 1987 speedometer. Does anyone know of a source for a wiring diagram so I can re-pin the connectors? Any surprises I should watch out for?

Thanx!
 

Title: Re: Factory Tach Swap into an 87
Post by: topp on May 31, 2010, 08:38:15 pm

You must wire it manually from the Dist.

The 87 uses VSS and the tach feed for that can NOT be shared

Title: Re: Factory Tach Swap into an 87
Post by: slamd83c10 on May 31, 2010, 10:31:38 pm

exactly

Title: Re: Factory Tach Swap into an 87
Post by: dahoyle on May 31, 2010, 11:27:12 pm

Quote from: Low87c10 on May 31, 2010, 06:53:23 pm

I have an instrument panel with the factory tach that I'd like to put into my 87. The panel is all electric, and I know that I will need to use the original 1987 speedometer. Does anyone know of a source for a wiring diagram so I can re-pin the connectors? Any surprises I should watch out for?

Thanx!
 

There is a pic of how I did mine in the following thread.   

http://www.fullsizechevy.com/showthread.php?424327-Instrument-Cluster-W-Tach