Case Study: Chrysler 300 A/C inoperative – compressor will not engage

Dec. 1, 2022

The A/C system will not blow cold air. The customer mentioned that he had noticed the compressor was not engaging.

Related To: ALLDATA

Vehicle: 2006 Chrysler 300, V8-5.7L, VIN H, Automatic Transmission/Transaxle

Mileage: 86,708

Problem: The A/C system will not blow cold air. The customer mentioned that he had noticed the compressor was not engaging.

Case Details: The technician tested for battery power to the A/C fuses. He found that there was battery voltage across both legs of fuses, four (20A) and 22 (40A) in the totally integrated power module (TIPM). Next, he tried jumping the A/C pressure switch, but the compressor still would not engage. An ALLDATA Tech-Assist consultant suggested using a wiring diagram from ALLDATA Repair (see diagram) to help trace the wiring and connectors between the A/C clutch relay and the compressor. The technician found pin 6 in connector C1 was corroded and broken in the connector.

Confirmed Repair: He repaired the damaged wiring connector. After the repair, the A/C system operated as designed. Easy fix!

Reprinted with permission from ALLDATA.

About the Author

Richard Diegle | Senior Automotive Editor for ALLDATA

Rich Diegle has been in the automotive industry since 1978. After graduating from a local community college, he began working at a Nissan dealership as a used car technician. Since then, he’s worked as a Nissan and ASE master automotive technician, shop owner, marketing copywriter, automotive editor, public relations manager, instructor, ALLDATA Tech-Assist team manager, and a senior automotive editor.