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=80133
Printed Date: May 14, 2025 at 2:22 PM

Topic: tach wire

Posted By: scooby-ej16
Subject: tach wire
Date Posted: July 10, 2006 at 12:49 PM

I need to find the tach wire on my 98 uk impreza so my Galaxy 5000-rs can learn the crank time for remote start. Can anyone tell me how to test for this wire? thanks posted_image

Replies:

Posted By: Evolution-UK
Date Posted: July 10, 2006 at 12:56 PM

You can either pick it up behind the instruments, at the ecu in the passengers footwell or take a feed from one of the injector wires.

With a multimeter set it to AC voltage. Connect the black probe to a suitable ground then test using the red probe.

You should find a wire which shows 1-2v at idle which will rise when you press the accelerator. Generally I pick it up at the dash.

Posted By: 12voltmaster
Date Posted: July 10, 2006 at 1:21 PM

scooby-ej16 wrote:

I need to find the tach wire on my 98 uk impreza so my Galaxy 5000-rs can learn the crank time for remote start. Can anyone tell me how to test for this wire? thanks

On my chart the color is : Blue or RED / green at coil on top of engine

Posted By: dea,can
Date Posted: July 10, 2006 at 2:44 PM

1.set meter to AC voltage

2. attch the black probe of the meter to chassis ground

3. start the vehicle

4. probe the wire suspected to being the tach wire with the red probe from meter

5. the meter will read between 1volt - 6 volts.

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dragon

Posted By: scooby-ej16
Date Posted: July 12, 2006 at 9:22 AM

thanks for all your help guys, Ill let you know how i get on posted_image

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