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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Neutral Safety Switch: Service and Repair


1. Disconnect neutral safety switch electrical connector.
2. Connect a digital multimeter, J34029-A, or equivalent, to neutral safety switch terminals 1 and 2, then test continuity with switch in ``P'' and ``N'' position.
3. Ensure continuity between terminals 3 and 4 with switch in ``R'' position.
4. If results are not as indicated, replace neutral safety switch.