03-08 dodge truck, aftermarket tachometer

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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=106392
Printed Date: May 09, 2025 at 3:17 AM

Topic: 03-08 dodge truck, aftermarket tachometer

Posted By: aer_david
Subject: 03-08 dodge truck, aftermarket tachometer
Date Posted: July 27, 2008 at 2:42 PM

there are conflicting arguements to wire an aftermarket tachometer in a 2003-2008 dodge truck with a 345 hemi the 6 cylinder model requires an adpter offered by each manufactueer, but i have yet to find out can the tach be wired directly to the existing factory tach , and what wire should be used.

Replies:

Posted By: benzo33
Date Posted: July 27, 2008 at 5:27 PM

You should get a Haynes manual to look for the wiring diagram. That's how I figured out to wire my head unit and nav system.

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2001 Corolla S and 2005 Neon SRT 4 ACR.

Posted By: Phreak480
Date Posted: July 27, 2008 at 6:09 PM

its not going to be in the haynes manual for that truck. i have an 03 ram with the hemi. i suggest you do a little online research and you can find places to download the service manual for free. unfortunately i'm sure i would not be allowed to post a link on here as it is in effect "stolen" but not very difficult to find either. i have seen both the 03 and the 04 manual for download

Posted By: aer_david
Date Posted: July 27, 2008 at 7:25 PM

THANKS, FOR THE HELP, I'LL SEE WHAT I CAN FIND.

Posted By: i am an idiot
Date Posted: July 27, 2008 at 8:33 PM

Tachometer dk. blue/gray ac PCM, BLACK/ orange plug, pin 34
Notes: The PCM is on the passenger side firewall. The BLACK/ orange plug is the second plug down from the top.

You may have that same color wire at the instrument cluster. If so check it with a volt meter to verify that the AC voltage increases with the increase of RPMs.

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