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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Blower Motor Relay: Testing and Inspection

Blower Motor Relay Inspection




1. Connect battery positive (+) terminal to terminal (1) of relay.
2. Connect battery negative (-) terminal to terminal (2) of relay.
3. Check continuity between terminal (3) and (4).
If there is no continuity, replace relay.