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)

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Test X: Constant Control Relay Module (CCRM)




NOTE
This Pinpoint Test is intended to diagnose the following:
- Constant Control Relay Module (CCRM)
- Harness Circuits: B+, FC, LFC, HFC, ACCS, WAC, VPWR (TO CCRM), A/C Clutch PWR, (Low/High) Fan PWR,GND
- Powertrain Control Module (PCM)

Pinpoint Test Schematics and Connectors

Escort (CCRM System):





3.8L Mustang (CCRM) System):





4.6L Mustang (CCRM System):






Pinpoint Tests