92 Dodge Ram diesel tach

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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=74299
Printed Date: May 16, 2025 at 1:14 AM

Topic: 92 Dodge Ram diesel tach

Posted By: kaezoo
Subject: 92 Dodge Ram diesel tach
Date Posted: March 11, 2006 at 5:33 PM

Can anyone tell me if there's a tach wire available on a 92 Dodge Ram diesel pickup? I couldn't find a wire anywhere that tests, and it's not working right with voltage sense.

Replies:

Posted By: xscash
Date Posted: March 11, 2006 at 5:39 PM

im not sure of the color....i think its white behind the cluster

Posted By: extreme1
Date Posted: March 11, 2006 at 5:39 PM

BLACK/ grey or grey/black

drivers side of underhood close to fender and firewall

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Shaughn Murley
Install Manager, Dealer Services
Visions Electronics
Red Deer, Alberta

Posted By: mo12v
Date Posted: March 11, 2006 at 5:40 PM

tach wire on diesel trucks is gray/lt. blue in pin 43 or gray/black in pin 24 at the PCM on the drivers fender.

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: kaezoo
Date Posted: March 13, 2006 at 8:47 PM

Thanks for the replies. Gray/black did the trick; it only tested about .25 VAC and didn't vary with rev, but the system learned it and it worked fine.

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