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90 Cherokee 4.0 tach wire remote start

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=72052
Printed Date: May 13, 2025 at 6:20 PM

Topic: 90 Cherokee 4.0 tach wire remote start

Posted By: fram
Subject: 90 Cherokee 4.0 tach wire remote start
Date Posted: February 02, 2006 at 3:28 PM

I have been trying to program the RPM learn on my autopage 850lcd. I have discovered I tapped into the oil pressure gauge and not the tach feed.

I have gone right to the coil and I find that the wire listed at the green tach wire delivers 13+ volts while the vehicle is running. This is the same at the tach gauge end. I have checked the Factory service Manual to confirm I have the right wire.

My problem is the alarm install manual says I should be getting between 1-6V not the 13v+ I’m getting.

Do I need to hook the tach wire to something else in the Cherokee?

Replies:

Posted By: KarTuneMan
Date Posted: February 02, 2006 at 4:47 PM

green or grn/wht

AC

coil or diag. conn.

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Posted By: fram
Date Posted: February 02, 2006 at 8:25 PM

Thanks, I missed the ACV part.

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