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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Oil Pressure Sender: Testing and Inspection

Engine Oil Pressure Switch Test

1. Disconnect the oil pressure switch connector (A) from the engine oil pressure switch (B).

2. Check for continuity between the oil pressure switch terminal and the engine (ground). There should be continuity with the engine stopped. There should be no continuity with the engine running.

3. Connect the oil pressure switch connector to the oil pressure switch.