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All you need is a 12v led from Radio Shack. The part # mentioned is already 12V [ meaning it already has a resistor built-in]...and has leads already on it , so you do not even have to make the tool if you just want a quicky code check on that car. You use it the same way as the tool, but you ground the led lead for the required tme instead of using a push-button sw. But for another buck, get the sw to make it easy........
That is all that is actually needed, right off RS shelf.
If you buy the car, you are going to want to make one with the sw and a chassis anyway....handy tool on that pre-OBD2 system, as you can see on that code page.
The tool is just a copy-cat extension of the built-in led/sw circuit. I justs copied the wiring off the Schematic of the Diagnostic Socket from the built-in one and put the 2 components in a case with leads so it is portable from car to car and also allows you to get into those other modules ..[ which is where the real Mangement codes are] On that chassis , I would be interested in pins 8 and 14, along w/DM . I also have plug ends that convert the leads bananna plugs to the plugs for the 38 pin DS. So, it can be used on all those models. You only need the banannas for that 16 pin box.
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A Dalton
Last edited by Arthur Dalton; 12-13-2008 at 11:55 AM.
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