Print Page | Close Window

Tach Wire Help

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=20476
Printed Date: July 07, 2025 at 5:11 PM


Topic: Tach Wire Help

Posted By: gtchida
Subject: Tach Wire Help
Date Posted: October 23, 2003 at 12:21 PM

I have a 2001 Dodge ram 1500 and I have located the tach wire at the coil (BLACK/ grey) but when I test it (AC) it comes up greater than the 1V-6V that the installation manual suggests (Hornet 554T).

Any help would be gretly appreciated...

Gary 




Replies:

Posted By: vaderfop
Date Posted: October 23, 2003 at 12:29 PM
Have you pushed on the gas while testing this wire? I have had some cars that test high for some reason. If the AC voltage moves with the gas that should be the wire.

Or, you can grap a tach wire at the injector, there should be two wires coming out of each injector (each will have one wire all the same color and one different), it should be the different wire. Be sure to double check with a DMM.

-------------
Remember check all your wires with a DMM!



Posted By: HamiltonAudio
Date Posted: October 26, 2003 at 1:56 PM

yep....the coil signal on some of the newer dodges is really really high...Autostart seems to tolerate them well, but others don't.  good call vader...grab an injector signal, and set it to 1 cylinder mode...

b




Posted By: GottaBNeat
Date Posted: October 26, 2003 at 3:36 PM
On a DEI remote start, it will handle your tach signal that high. You have to change you voltage threshold to high though. It's a jumper on the side of the unit. Change it before you progam your tach signal and you will be fine.



Posted By: gtchida
Date Posted: October 27, 2003 at 10:13 PM

Thank you everyone for your responses - I will be testing it this week.

Gary


Print Page | Close Window