Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

A/C Signal: Testing and Inspection

If the low pressure and high pressure switches are closed and A/C is "ON," the A/C clutch should indicate "ON." Refer to C Charts/Chart C-10 A/C Clutch Control Circuit for A/C electrical system diagnosis. Chart C-10 A/C Clutch Control Circuit Diagnosis