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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Park/Neutral Switch Input

When CLOSED, the Park/Neutral Switch provides an input to the Powertrain Control Module (PCM) on circuit T41. The T41 circuit is spliced and provides a ground path for the engine starter relay, and the Transmission Control Module (TCM).