Siezed a/c compressor or clutch
Probably just your clutch... The compressors give some warning before they just seize...
did the accessory belt start smokin' and threatening to catch fire?...I hate it when that happens----you'll be needing to get another rebuilt unit or rebuild the one you've got~
here are some replacement choices~
Looking for a Used Ram 1500 in your area?
CarGurus has 11,092 nationwide Ram 1500 listings starting at $700.
Search Dodge Ram 1500 Questions
Dodge Ram 1500 Experts