WHAT ARE J/C1 AND J/C2 ON PCM

  • Tiny
  • david d
  • 1998 Dodge Ram
  • 78,000 miles

Are these test points that can be used for looking for relay coil grounds in PCM. Across coil + - I read 2.75v but from relay coil + to frame I get 12.00v

Sunday, April 8th, 2012 AT 7:28 AM

1 Answer

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Which engine do you have?

C1 is for the A/C compressor relay coil.

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Sunday, April 8th, 2012 AT 8:26 AM

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