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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Radiator Cooling Fan Control Module: Description and Operation

The EEC Module receives signals from the Engine Coolant Temperature Sensor, Vehicle Speed Sensor, and Clutch Cycling Pressure Switch to determine if the Electric Cooling Fan should be activated. When conditions are met to activate the Electric Cooling Fan, the EEC Module will provide a signal to energize the EDF Relay (2.3L and 3.0L) or HEDF Relay (3.0L ONLY) and operate the Cooling Fan.