Truck listed above is a 2500. Changed compressor, dryer, condenser, pulled vacuum, filled with Freon. Compressor won’t com on unless jumped at relay. Changed fuse block. Checked fuses. Need the article on how to check voltage on pressure switch and command to relay. Have 3 pin high pressure switch and 2 pin cycling switch. Took it to Knick car they said it had Freon. They used recover device, emptied, pulled down add Freon and couldn’t figure out. Can I check at pin 85 to see if PCM is signaling to ground. Fred
have the same problem?
Sunday, July 25th, 2021 AT 5:50 AM