Tach Wire (Page 1/1)
RotrexFiero DEC 05, 06:04 PM
Looking to install my shift light...Looking for the tach wire under the dash. I have a 3800sc.

I guess I must have utilized the one from the pcm or ignition module years ago. But, darn if I can find it.

Any help?
zkhennings DEC 08, 01:59 PM
*Removed incorrect information*

[This message has been edited by zkhennings (edited 12-10-2021).]

olejoedad DEC 08, 04:54 PM
Tach wire enter the chassis harness via C500-C3

Easy way to get to it is to tap the white wire at Instrument Cluster connector C3.

Take the cover off of the dash side of the pod and locate the vertical plug on the cluster housing.

The white wire is on terminal 18, and is on the top of the connector as it is installed.

Be careful of the contacts on the cluster side, they can delaminate and get crossed up.

You may be able to tap it without removal if you have small hands.
RotrexFiero DEC 09, 07:09 AM
Thanks that's what I was looking for....it C500 not C203

But, Yeah I was looking for something right there under the dash