2005 equinox tach wire

Hello.  Does anyone know the exact location of the tach wire in a 2005 Chevy Equinox.  I have already messed up my PCM by choosing the wrong wire due to lack of location description.  "purple wire to rear of motor" does not suffice when there a multiple purples.  Is it even worth hooking the tach wire to the remote start? or is it just a fancy feature that is not really necessary?

Thanks again in advance!

Don.

Sorry....... just a follow up.  How are the pins numbered in the PCM?  Pin 61 would be which one?  They aren't labled and I don't have a wiring manual handy.  (propably wouldn't be asking this question though if I did)

Thanks Again.

The tach signal is required on some remote start units.  Some remote start units do quite well with voltage sensing or virtual tach.  Most professionals try to use a tach signal whenever possible.  You didn't mention which brand/model you have so.....

You can use a Digital Multi Meter to test a wire for a proper tach signal.  Set DMM to AC and chose a voltage range that will display a voltage between .5 to 8 volts.  Black to a good ground and red to the wire.  Start the engine.  The voltage should rise with RPM's.

I did a 05 Equinox and ended up using a Violet wire at the Ignition Control Module at the top rear of the engine.

Sorry.  It is a Viper 5301 Remote Start only.

Thanks.  i think I'm just unsure which is the Ignition control Module.  Is it mounted right to the rear of the motor?

Unfortunately I didn't take any pictures of that install.  It was over a year ago and I'm drawing a blank.  I think the module was bolted to top rear of the engine. 

I believe the Equinox a "one touch start" engine.  Thats where you can just turn the key to start and release immediately and the engine continues to crank until its started.  If it is, you might try going in the vipers tachless mode (virtual tach or voltage).   I don't use Viper products but there are plenty on this forum that do and could offer advise.

DEI says...

purple at the PCM, black plug pin 61. The PCM is located in front of the driver strut tower, above the battery cover. You can also got to any fuel injector and use the wire that is NOT pink.