"I would also like to mention that the orange Serial Data wire needs to be
relocated from the top row, Pin "E" to the lower row, Pin "M". You will also
need to scan the vehicle like a 1993-1995 G-Series Van, C-Series Truck,
S-Series Blazer, etc with Auto transmission. "
I have read this a couple times myself, but first time I read it was after I had already been datalogging with my 7427.
I have never moved the pins in the ALDL plug and it still works just fine. But I have read where other people have had to swap because they couldnt get aldl connection. Why would mine still be working just fine?