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5746, RE: ECU is mad, refuses to do its reduced functions
Posted by bullettdsm, Dec-31-69 06:00 PM
Originally posted by Tired2
As in the ignition 12v power to the ECU? I don't recall the pin number, but I spliced to a cable that went to the ECU... I recall it being like a 10 or 12ga when the others were a bit smaller. I tapped into it and I use that to run my main 12v relay coil.
Yeah, you should have piggybacked into a wire that is powered when the key is turned on (I use a black and white wire that is in position B20 off the ECU plug). Sounds like that is what you have done. Can't seem to figure out what you could have done to cut the alternator power. You don't really touch the alternator wires at all. If you piggybacked the ignition wire, then the ECU knows when the ignition is on.
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