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ECM wire diagram. on 2001 Buick Regal

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A customer brought us a used car that had a lot of electrical problems. after inspection we determined that it was the ECM located underneath on the driver side. There were a lot of splices that apparently was to a previously self-installed remote starter switch. I had to solder and heat shrink the splices that were left exposed. Also a brown wire was left pulled out of the ECM connector. My question is where does this one brown wire plug into? Thank you for any help.
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