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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Information Bus: Testing and Inspection

INTEGRATION CONTROL AND PANEL

I24 (A), I25 (B) INTEGRATION CONTROL AND PANEL
(B) 12 - GROUND : Approx. 12 volts with ignition SW on and blower SW on
(B) 4 - GROUND : Approx. 12 volts with ignition SW at ON or ST position
(B) 5 - GROUND : Always approx. 12 volts
(B) 13 - GROUND : Approx. 12 volts with ignition SW at ACC or ON position
(B) 1 - GROUND : Always continuity
(A) 11 - GROUND : Always continuity