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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Radiator Cooling Fan Temperature Sensor / Switch: Service and Repair


1. Disconnect battery ground cable.
2. Raise and support front of vehicle, then drain cooling system.
3. On 4.0L/6-243 models, remove air cleaner assembly for access to thermostatic switch.
4. On all models, disconnect thermostatic switch electrical connector and remove thermostatic switch.
5. Reverse procedure to install.