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kreg357 
Platinum - Posts: 7,781
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: January 30, 2009
Location: Pennsylvania, United States
Posted: March 27, 2013 at 7:58 PM / IP Logged  

X2 with Pentavolvo...

I would go with Tach Mode.  Here is some info from Bulldog Security :

NOTE #2: On DIESELS the TACH wire is a WHITE/ PINK located at the PCM (Powertrain
Control Module) or at the Main Harness that runs on the inside of the firewall to the left
of the brake pedal.  

Another way, if that wire provides a marginal Tach signal, is with the use of a

Directed 454T module ( under $30 ).

Soldering is fun!
jeffsjk 
Member - Posts: 9
Member spacespace
Joined: March 22, 2013
Posted: March 27, 2013 at 8:02 PM / IP Logged  
I almost hooked up the tach wire, there are 2 WHITE/ pink wires and I'm not sure how to test that. How can I test the tach wire?
jeffsjk 
Member - Posts: 9
Member spacespace
Joined: March 22, 2013
Posted: March 27, 2013 at 8:12 PM / IP Logged  
Duh. Ac current ill have to mess with it later this week. It's weird that it worked then stopped. Ill hook up the tach and reprogram it and see what she does. Thanks for the help again guys.
kreg357 
Platinum - Posts: 7,781
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: January 30, 2009
Location: Pennsylvania, United States
Posted: March 27, 2013 at 8:46 PM / IP Logged  
Tach test.  DMM to 20V AC, Red lead to suspect wire, Black test lead to chassis ground.   Should see a 1V to 5V signal that rises slightly with RPM.
Soldering is fun!
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