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  • Window switch tach signal information

    I did a search earlier today and found that hooking up a window switch is a PITA cuz finding the 'elusive white' tach signal wire isnt so easy. Some people tap into their gauge cluster wire or the 54 pin on the PCM, those are hard to get to and difficult to find.

    BUT, if you take off your coil packs you will find a wire loom connected to the ICM, the solid white wire thats between the puple/white and black wire is a good tach signal wire. DO NOT use the solid white wire on the very end towards the passenger side, it will pull too much current and your car will have trouble starting.

    Just thought I'd let ya'll know so you wouldnt have to go thru the same headache as I did trying to hook it up. :)
    sigpic
    1997 Camaro RS A4
    2006 Chevy Colorado
    2003 Kawasaki Ninja ZX6-R

  • #2
    Re: Window switch tach signal information

    that is good to know.

    we didnt have a hard time finding the tach wire on my pcm though.
    2002 SOM Camaro- Sold
    2006 S60- Sold
    2000 Cherokee- The desert whip

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    • #3
      Re: Window switch tach signal information

      ALso you can take it off the cam sensor wire in front of the engine. I already had a wire coming off the pcm output for my shift light and it would draw too much power having the shift light and the window switch on and kill the car. So the I took mine off the cam sensor. pretty easy to get too.
      08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
      96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

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      • #4
        Re: Window switch tach signal information

        Originally posted by ssms5411
        ALso you can take it off the cam sensor wire in front of the engine. I already had a wire coming off the pcm output for my shift light and it would draw too much power having the shift light and the window switch on and kill the car. So the I took mine off the cam sensor. pretty easy to get too.
        I tried that wire and didnt work for me Oh well, maybe I'm just retarded :(
        sigpic
        1997 Camaro RS A4
        2006 Chevy Colorado
        2003 Kawasaki Ninja ZX6-R

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        • #5
          Re: Window switch tach signal information

          I had to try 2 out of the 3 wires because they were so old and dirty I couldn't tell what the colors were. But finally go it to work.
          08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
          96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

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          • #6
            Re: Window switch tach signal information

            Originally posted by ssms5411
            I had to try 2 out of the 3 wires because they were so old and dirty I couldn't tell what the colors were. But finally go it to work.
            happy birthday :banana: :banana:

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            • #7
              Re: Window switch tach signal information

              Thanks, the only one that noticed.
              08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
              96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

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              • #8
                Re: Window switch tach signal information

                I have a Digital Window Switch, and there are 2 white wires comming off of my PCM. ive tried both and still cant get a signal (or so i think).
                also in the programming manual for my switches, the tach set up has many diferent options to choose from (individual coil per cylinder(000), coil packs that fire in pairs(001), or number of cylinders(002-012). LS1 engines conecting to pcm use (004).
                please help!

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                • #9
                  Re: Window switch tach signal information

                  i believe the brown and white wire coming off the icm is what i am tapped into, works great, just set your window switch to 1 cylinder

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                  • #10
                    Re: Window switch tach signal information

                    yea look by your coil packs, there is a white wire there on the harness you can tap
                    http://www.bowtiev6.com/

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                    • #11
                      Re: Window switch tach signal information

                      thanx.. ill give that a shot, although getting to the harness for the coilpacks on my firebird is near impossible. but ill give it a shot.. thnx.

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                      • #12
                        Re: Window switch tach signal information

                        Originally posted by bah
                        i believe the brown and white wire coming off the icm is what i am tapped into, works great, just set your window switch to 1 cylinder

                        Same here, works great for me.
                        Old Car = 12.679 @ 106.5 on 150 dry shot.
                        New Car = 2010 3.6l 304hp Camaro

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                        • #13
                          Re: Window switch tach signal information

                          what does the brown wire do? the white wire is the signal wire correct? then what is the significance of the brown wire?

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                          • #14
                            Re: Window switch tach signal information

                            SUCCESS!!!! I figured it out... there are 2 white wires comming off the back of my pulse coils... i piggy backed one of them and it started giving me an acurate reading after i set the switches to 6 cyl.... however the switch is about 200 rpm slower then the actual tach... but i think its livable!

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                            • #15
                              Re: Window switch tach signal information

                              good to hear you were able to get a signal finally. Maybe snap a pic of the wire if possible for others later on to see
                              http://www.bowtiev6.com/

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