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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Audible Warning Device Control Module: Description and Operation

The Multi-function Alarm Module sounds the Lights-on chime when the following three conditions are met:
^ Battery voltage at Conn C1 terminal "D" indicates that the Park or Headlights are on.
^ 0 volts at Conn C1 terminal "M" indicates that the Ignition Switch is in "OFF," "ACCY," or "LOCK."
^ Ground at Conn C1 terminal "H" indicates that the LH door is open.