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: Description and Operation

Park/Neutral Position Switch

The Park/Neutral Position Switch switch as used on automatic transmissions is transmission-mounted and permits the vehicle to start only in the park or neutral positions.

The switch is multi-functional in that it not only permits the vehicle to start in neutral or park, but acts as a back-up lamp switch and also controls range shifting in vehicles equipped with electronic shift transfer cases.