Here ya go. I got the resistors and relay at Radio Shack.
The relay isn't included in the how-to but is very easy to install if you want to use one for a factory switch. I can get you the part # if you go that route...
http://www.vehicross.info/modules.ph...warticle&id=74
...Thinking about it more, maybe you can get around the resistors if unplugging the ECU doesn't cause a check light. I wonder if putting a switch on the ECU 12V wire would be the same as unplugging the ECU? Then you wouldn't need the resistors or relay and it would be a really simple modification.
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