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NO COMMS WITH ANY MODULE

  • Tiny
  • Anonymous
  • 2001 Chevrolet Express
  • 500,000 miles

No comms with any module. No fuel no spark. Gauges not working right ignition module gets hot with key on
checked power and ground on pcm. Checked ok replaced pcm worked ok 1/2 hour and did the samething

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Saturday, December 8th, 2012 AT 9:49 PM

1 Reply

  • Tiny
  • JDL
  • Expert
  • 16,289 posts

About all I can tell you now is to check for voltage at pin 16 of datalink connector. Pins 4 and 5 are grounds.

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Saturday, December 8th, 2012 AT 10:42 PM

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