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)

Or, hide this message: temporarily or permanently

Data Link Connector: Testing and Inspection

- Circuit Z12 also supplies a ground for the PCM high current drivers.
- If the system loses ground for the Z12 circuits, the vehicle will not operate.
- Circuit F86 splices to supply battery voltage to the heated rear window switch, overdrive switch, vehicle theft alarm module and rear lighting system. Circuit F86 also powers the coil side of the Automatic Shut Down relay and fuel pump relay