PCM wont send sigal to Alt.
07-26-2010, 10:13 AM
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PCM wont send sigal to Alt. I swapped a ls6 into my 91 Chevy truck about a month ago. Everything was working great I have put 500 miles on it since the swap. But last week it died going home from work. Checked gauges and volt gauge was buried on the bottom. I checked the alt it was ok, there is power at the stud on the back, but I cant get any power out of the PCM at pin 15. Is there anything in the tune that can randomly cause it not to give the exciter wire a signal?
