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02 Express Conversion Van-Steering Wheel Controls


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I recently installed a Nav system into an 02 express conversion Van. I'd like to add steering wheel controls and, if possible, some type of driver information center.

 

For the steering wheel controls, I have the buttons and Steering Wheel rear shroud from an 02 blazer/trailblzer. The steering wheel in the Express appears to match. i puchased a new clockspring, and that appears to be correct. I can't find a harness under the dash that the steering wheel controls would plug into. Will there be some intermediate wiring harness to get from the clockspring to the radio? I may be wrong, but I thought the factory stereo had speed dependent volume, so I suspect the communication bus would be present.

 

Since the Nav unit is aftermarket (Sony), I also have a Universal steering wheel control interface to convert to the stereo jack input for remote control. Does anyone have a wiring diagram for the four wires at the clockspring? The Pacific Accessory Corp Steering Wheel Interface just uses power, ground, and the green wire at the stereo connector. I suspect I should be able to wire thru the 4 wires from the clockspring into the SWI interface and be good to go.

 

I'd also like to install a DIC display appropriate for the year. Does an 02 Express use the same communication bus as an 02 blazer or Trailblazer? I'd thinking of finding a junkyard display if it could be easily integrated into the Express wiring.

 

Thanks for any help!

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