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Thread: Pontiac Grandprix

  1. #1
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    Question Pontiac Grandprix

    I am trying to finish out the install for my grandprix (the third car this player has been in). The player has no gui so just a few buttons are needed

    I would like to use the steering wheel buttons, but I don't have the wiring diagram, google didn't show anything up. Anyone have any information?

    Thanks

    Anthony

  2. #2
    Raw Wave Defiler's Avatar
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    If you have an IR reciever you can use a Steering Wheel Radio Control w/ Girder.
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  3. #3
    Constant Bitrate
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    Try www.alldatadiy.com You'll have to pay for a year's subscription to the service manual, but I'd be relatively sure they have a schematic for the steering wheel controls. Other wise you'll probably need to start poking around in the wiring harness by the steering column to find out what's what. A word of advice in this though, do NOT use a test light if the vehicle is equipped with airbags.

  4. #4
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    I have a microcontroller in the front panel and would like to directly interface to it, I don't have IR in my car.

    I think I have the specific wire I need, but 8 buttons are connected to 1 wire, I need to figure out how!

  5. #5
    Variable Bitrate Leddy's Avatar
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  6. #6
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    Smile

    Silly me didn't wait for the image to load!

    U da MAN! That's exactly what I need!

    Nice vehicle! Mine is a long way from that, I am going for the "nearly stock" look. The only thing that will look significantly different is the front panel and the graphic mounted to the side of the center console.

    I will have pics when I am done.

  7. #7
    Variable Bitrate The Grinch's Avatar
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    As a fellow GP'er, I also need to interface my steering wheel controls with my carputer. So what's the plan to get this to work?

  8. #8
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    The Plan!

    First off, mine is not so much a carputer, it doesn't do a lot of the stuff I see going on in these forums, it'll play mp3's from playlists it will play the radio via an ISA radio card, it might have GPS on it, but no "take this road" stuff, more like "you have to go towards the east". So as you can see my interface requirements are much more modest...

    For output, I have a parallel 4x20 VFD and I am connecting this to the PC serial, to accomplish this I have designed a front panel board (that I will etch myself) that has a microcontroller on it (PIC 16F876A) which has an ADC on board, I think I will have to use a negative gain op amp to get the possibly 12v from the buttons down to 5v that the PIC can use. Once I have a variable level I can send the appropriate message to the PC and process it.

  9. #9
    Variable Bitrate brooksware2000's Avatar
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    Quote Originally Posted by toftat
    First off, mine is not so much a carputer, it doesn't do a lot of the stuff I see going on in these forums, it'll play mp3's from playlists it will play the radio via an ISA radio card, it might have GPS on it, but no "take this road" stuff, more like "you have to go towards the east". So as you can see my interface requirements are much more modest...

    For output, I have a parallel 4x20 VFD and I am connecting this to the PC serial, to accomplish this I have designed a front panel board (that I will etch myself) that has a microcontroller on it (PIC 16F876A) which has an ADC on board, I think I will have to use a negative gain op amp to get the possibly 12v from the buttons down to 5v that the PIC can use. Once I have a variable level I can send the appropriate message to the PC and process it.
    YOu could just use a voltage divider network that will convert the 12V output down to 5V for the PIC. For example, a 7k and a 5K will yield 5V output for the PIC to read. You could even use a 15k variable resister to get 5V.

  10. #10
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    Yeah, that's what I am thinking, the top side (pic to 12v) will effectivly be a variable resistor, the low side will just be the right size to pull it down to 5v, hopefully I can get the impedances right. I am also thinking of putting a zener in just to make sure it won't hurt the PIC

    For the other GP'er, once I get mine to work, I'll be happy to put one together for you, contact me via email to discuss

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