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

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Principles of Operation




Parking, Rear and License Plate Lamps

Principles of Operation

The headlamp switch is provided voltage at all times from the Central Junction Box (CJB). When the headlamp switch is placed in the HEADLAMPS ON position, voltage is routed to the GEM (Generic Electronic Module) (as an input), and through the CJB (Central Junction Box) fuses to the parking lamps.