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)

Or, hide this message: temporarily or permanently

Neutral Safety Switch: Description and Operation

CIRCUIT OPERATION
When CLOSED the Transmission Range Switch (TRS) provides an input to the Powertrain Control Module (PCM) on circuit T41. This circuit connects to cavity 76 of the PCM connector. The T41 circuit is spliced and provides a ground path for the engine starter relay, and the Transmission Control Module (TCM).