98 Grand Cherokee Tach Wire

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=87204
Printed Date: May 07, 2025 at 11:43 PM

Topic: 98 Grand Cherokee Tach Wire

Posted By: 01z2nv
Subject: 98 Grand Cherokee Tach Wire
Date Posted: December 14, 2006 at 2:59 PM

Ok so I have read that you can tap the tach wire at the coil or pcm.... believe it was gray/white, my question is does anyone know if this color follows through to the back of the speedometer and tach in the dash. Was just thinking I would rather tap it there if possible. So if anyone can confirm this or knows which wire it is back there it would be greatly appreciated...

Thanks

Replies:

Posted By: Hymer
Date Posted: December 14, 2006 at 3:17 PM

Grey and white atthe PCM I don't think it goes to the dash... runs coil to PCM and from there is anyones guess...

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High End Restyling and Comlete Repair

Posted By: mobilecustoms
Date Posted: December 14, 2006 at 3:53 PM

try an injector wire

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Posted By: xtremej
Date Posted: December 14, 2006 at 5:31 PM

I would advise not attempting finding tach at the gauge cluster on this vehicle. If removed the computer looses communication with the idle control and it will red line when re-started, trust me i did it. If you decide to try it, diconnect the battery after you unplug/remove the cluster.....

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Posted By: mobilecustoms
Date Posted: December 14, 2006 at 5:32 PM

thats good to know

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Posted By: installmarc
Date Posted: December 14, 2006 at 6:38 PM

i have found the tach located in the group of wires directly above the gas pedal . i think it was gray/blue

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