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=5138
Printed Date: May 28, 2024 at 3:21 PM

Topic: Tach Wire

Posted By: sach_deva
Subject: Tach Wire
Date Posted: November 04, 2002 at 11:43 PM

Hi,

Also regarding 1987 300E Remote start car alarm

I tried finding the tach wire, at the left inner fender, and I checked the wire colours, and they do not match. If I have a voltmeter how would I know the wire I am testing is in fact the tach wire?

Replies:

Posted By: salb0006
Date Posted: November 05, 2002 at 12:06 AM

Set the voltmeter to AC Volts scale. The wire should read somewhere between 1 and 6 volts AC with the engine idling. It will then increase as the speed of the engine increases. Good luck to you!!

Posted By: Velocity Motors
Date Posted: November 05, 2002 at 12:27 AM

Place the RED test probe on 12 volts and pace the BLACK lead on the target wire. Then do what salb0006 suggests.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: kickyride
Date Posted: November 05, 2002 at 10:54 AM

Actually, you can connect it that way or you can put the red wire on the target wire and the black on ground since AC voltage is not polarity dependant and sometimes ground is easier to find than a +12 volt source. I've done it both ways with success.

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Mike
Sales/Tech Support - KICKYRIDEoCOM mobile electronics
MECP 1st class-Security Specialist

Posted By: sach_deva
Date Posted: November 09, 2002 at 1:17 AM

wow thanks! I never knew a volt meter was that useful.....

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Posted By: kickyride
Date Posted: November 10, 2002 at 7:51 AM

Every installer should have a digital multimeter! posted_image

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Mike
Sales/Tech Support - KICKYRIDEoCOM mobile electronics
MECP 1st class-Security Specialist

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