Did you check to see if you have a "X11/21 LED+sw combo" in your car?? You should do that first. If it's there, then you can get codes from the Diag Module . . . and that's a start.

Certainly you can make one yourself or get one from the 'e-bay' link; that's basically what the LED+sw combo is except that you can get codes from all of the populated pins in the 38 pin connector.

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Regards . . . . JimF
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'94 S500 Cpe

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