External tach output for 04 V
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2004-2007 Cadillac CTS-V Performance Mods Discussion, External tach output for 04 V in Cadillac CTS-V Series Forum - 2004 - 2007; Is there a place to tap the tach output for a data acquisition system anywhere that is relatively easy and ...
  1. #1
    Scott Sanda is offline Cadillac Owners Member
    Automobile(s): 04 CTSV SCCA T2 racecar
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    External tach output for 04 V

    Is there a place to tap the tach output for a data acquisition system anywhere that is relatively easy and that doesn't involve splicing into the white wire at pin 10 on the ECU?

    Thanks,

    Scott

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  3. #2
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
    Automobile(s): 05 maggied CTS-V, 03 maggied Z06
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    Re: External tach output for 04 V

    The OBD port, but you are gonna need software........

  4. #3
    ichpen's Avatar
    ichpen is offline Cadillac Owners Connoisseur
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    Re: External tach output for 04 V

    There must be an easier wire to tap, I recall some folks have had success tapping into one of the coilpack wires or even some wires out of the fuse box. I need to do the same for my shift light which I've had for about a year (just remembered).

  5. #4
    ichpen's Avatar
    ichpen is offline Cadillac Owners Connoisseur
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    Re: External tach output for 04 V

    Actually, googled this and it should work. It's for a C5 and a separate thread for a C6 but same ECM so wiring should be same to the obd port.

    http://www.z06vette.com/forums/f64/t...-where-105273/

    Going to give it a try as I hate running even more wiring through the firewall.

  6. #5
    crankedupforit's Avatar
    crankedupforit is offline Cadillac Owners Connoisseur
    Automobile(s): 05 CTS V 07 ESCALADE
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    Re: External tach output for 04 V

    Quote Originally Posted by ichpen View Post
    Actually, googled this and it should work. It's for a C5 and a separate thread for a C6 but same ECM so wiring should be same to the obd port.

    http://www.z06vette.com/forums/f64/t...-where-105273/

    Going to give it a try as I hate running even more wiring through the firewall.
    Ever figure this out mate? I have a spa design shift light I'd like to install.

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