Originally Posted by PAhonda

I found the green 22 pin connector to give you a place to start. On the row away from the clip/tab there will be a blk/yel, then a blank, then a blk wire at the end. They are likely a thicker gauge wire. If you have a volt meter, you can check the blk/yel wire gets 12V when the key is in the II position. The blk wire should have zero resistance to ground and not open circuit or high resitance (say greater than 100 milli ohms)