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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A/C Signal: Testing and Inspection

Fig. 9 Connecting test light between electrical connector terminal 7 and ground:





1. With engine operating, connect test light between electrical connector terminal 7 and ground, Fig. 9.
2. With A/C off, test light should be off. With A/C on, test light should come on. If no faults have been found but CIS system still does not operate correctly, install a new electronic control module and repeat tests.