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tach wire 2002 chevy siverado

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=4337
Printed Date: July 23, 2025 at 10:28 AM


Topic: tach wire 2002 chevy siverado

Posted By: grymus
Subject: tach wire 2002 chevy siverado
Date Posted: October 10, 2002 at 1:40 PM

can anyone tell me where to grab the tach wire and what color it is on a 2002 chevy silverado 2500HD?  I know i asked this before but lost my note on it.  Also same truck I have the negative door triggers where when the door is opened the wire goes to ground.  So i looked at that the digram on the 12volt page to diode the wires to the alarm it seemed backward to me.  Which side does the strip on the diode go to..the alarm side or the trigger side?

Thanks,

Ryan




Replies:

Posted By: SnomanF150
Date Posted: October 10, 2002 at 2:13 PM
if you are looking for a tach for a remote start, you can get it at an injector.. just look at the injectors and use the wire that is not common.. I believe a pink is common on the injectors.. has to be a programming tach type of remote start I believe for this to work..

the strip/band side of the diode will go to the trigger side to allow (-) to go the alarm..

-------------
George

David's Car Stereo

Baton Rouge, LA



Posted By: securinu
Date Posted: October 10, 2002 at 5:02 PM
you can also get the white wire @ the pcm. this is located to the left front of the engine. there are 2 white wires so you have a 50/50 chance of getting it right on the first try. this is an 8 cylinder signal.



Posted By: grymus
Date Posted: October 10, 2002 at 6:48 PM
is there anyone who can tell me which wire it is in the PCM?



Posted By: securinu
Date Posted: October 10, 2002 at 7:42 PM
pin 10 of the 80 pin connector , but there not labeled so just dig into the harness and pull the 2 white wires.


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