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2000 Dodge Durango Tach Wire


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trey003 
Member - Posts: 19
Member spacespace
Joined: December 20, 2017
Location: Texas, United States
Posted: December 20, 2017 at 5:58 PM / IP Logged  
Can someone help me understand where the tac wire is on a 2000 Durango? My diagram says 'passenger side of engine'. That was probably correct for 99 when there was a singe coil. The 2000 has 8 individual coils. Is it acceptable to get a tac reading off an individual coil for remote start? If so, does it matter which coil? Thanks in advance.
kreg357 
Platinum - Posts: 7,581
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: December 21, 2017 at 8:04 PM / IP Logged  
With the use of individual coil packs and multi-point fuel injection it has become common to obtain the remote starter Tach signal from one of these locations. The main issue is if the remote start unit has been designed and engineered well enough to be able to use one of these signals. My info on your vehicle suggests that a fuel injector is a possible source. Here is that info :
Tach Signal     NOT BROWN\WHITE      ANY FUEL INJECTOR
Which also answers your second question. Use any Fuel Injector that is convenient.
Soldering is fun!
trey003 
Member - Posts: 19
Member spacespace
Joined: December 20, 2017
Location: Texas, United States
Posted: December 21, 2017 at 11:42 PM / IP Logged  
Thanks. I really appreciate the help.
trey003 
Member - Posts: 19
Member spacespace
Joined: December 20, 2017
Location: Texas, United States
Posted: January 09, 2018 at 3:33 PM / IP Logged  
I am getting voltage readings as high as 32 volts AC on the individual coil wires and fuel injector wires. My installation manual says I should be seeing 1-6 volts AC. I am installing a Viper remote start. How do I know if my unit will handle this kind of voltage. I have installed many remote start units, but his is my 1st multi coil/multi injector install. Thanks for any help.
trey003 
Member - Posts: 19
Member spacespace
Joined: December 20, 2017
Location: Texas, United States
Posted: January 22, 2018 at 11:01 PM / IP Logged  
This issue has been resolved. The higher than expected voltage was not a problem.
i am an idiot 
Platinum - Posts: 13,491
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: January 24, 2018 at 3:49 PM / IP Logged  
It is actually a pulsating DC voltage. It is impossible to get an accurate voltage reading in that situation. Different meters will give different readings. As long as the readings go up and down proportional to engine speed, you have the right wire. As You already know.
howie ll 
Pot Metal - Posts: 16,466
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Joined: January 09, 2007
Location: United Kingdom
Posted: January 27, 2018 at 2:25 AM / IP Logged  
In future use an LED probe if it's flashing and the flash rate increases with revs you're done, forget a meter.
So much faster.

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