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Window Switch Help

This is a discussion on Window Switch Help within the Nitrous forums, part of the LSx Technical Help Section category; Installin a nitrous kit on a 98 Trans Am. Having trouble finding the Tach wire for the MSD Window Switch. ...

  1. #1
    Richard Nock, Jr.
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    Window Switch Help

    Installin a nitrous kit on a 98 Trans Am. Having trouble finding the Tach wire for the MSD Window Switch. The car dosent have traction control and havent had any luck using Mitchele On-Demand, the wire they give me dosent seem to be the tach wire. Someone please help. I'm Using a MSD 8956 Window Switch.

  2. #2
    Grand Imperial Wizard Sarge's Avatar
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    Hey Richard....for a 98 Trans Am...from Pontiac.........
    8 cylinder engine tach wire is white at Powertrain Control Module (PCM) under hood on passenger rear of engine compartment................
    Hope this helps...........

  3. #3
    Richard Nock, Jr.
    Guest
    I went to the white wire, which there are accually 3 of them, and hooked up a Tach to make sure that i had the right wire and not even the Tach would work, im thinking that maybe there is another wire ore there is something wrong with the car. The factory tach does work. Thank you for any help that anyone can give to me.
    Last edited by Richard Nock, Jr.; 08-12-2005 at 02:32 PM.

  4. #4
    Grand Imperial Wizard Sarge's Avatar
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    Well shit! Hang on.....lets see WTF....I have access to some Pontiac boys....give me an evening......gotta pick the daughter up at the airport tonight...give me till tomorrow.....We'll whup this thing man...damn wires anyway...I hate electrical shit....

  5. #5
    Richard Nock, Jr.
    Guest
    thank you, would appreciate any help that you can offer, trying to avoid tearing into the dash to find the tach signal, plus the mitchel on-demand program that i have, its wiring diagram dose3nt seem to match the harness in this car. It also tells me about an ign. module on the left cylinder head that i have yet to find. Thanks again for the help and any info you can get me.

  6. #6
    XTrooper
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    Richard,

    Do you have your window switch in 4-cylinder mode? It must be in this mode to work with LSx motors. It will not work in 8-cylinder mode.

  7. #7
    Richard Nock, Jr.
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    Re: Window Switch Help

    I havent tried that but i guess it is worth a try, i will let everyone know if it works.

  8. #8
    Registered Player brad8266's Avatar
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    Re: Window Switch Help

    The wire you want is the number 10 white wire that comes out of the computer.

  9. #9
    Grand Imperial Wizard Sarge's Avatar
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    Re: Window Switch Help

    Check out the big brain on Brad! (lil help from Pulp Fiction)
    My Pontiac buddy tells me the same thing.....

  10. #10
    Registered Player brad8266's Avatar
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    Re: Window Switch Help

    lol

  11. #11
    Richard Nock, Jr.
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    Re: Window Switch Help

    thank you for the help but switching the aftermarket tach and the window switch to 4 cyl mode did the trick, if that isnt mind blowing on a V-8. The N20 is hiting just as planned, thanks for the help.

  12. #12
    Richard Nock, Jr.
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    Re: Window Switch Help

    I guess i should have know because the system fires 2 coils at the same time which makes the ign look like a 4 cyl to the tach and the Window switch, well i hope this will save someone elese the headache that i got from trying to figure it out.

    Thank you to all who tried to help out, now its off to the next phase, heads, pistons, intake, cam, 4:10 gears, converter, and a 400 hp shot.

    Ram air, headers, 3:73 gears, and program are all ready installed. the car ran 1/8 mile in 8:20 on Nitto street tires. Hoping new changes will get into the low 7's.

  13. #13
    XTrooper
    Guest
    Glad to help.

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