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

Test F

PINPOINT TEST F: THE KEYLESS ENTRY KEYPAD ILLUMINATION IS INOPERATIVE


Test F1-F3:






Test F4-F5:






Normal Operation
With the keypad illumination activated, the vehicle security module supplies power to circuit 66 (LB) to illuminate the keypad. The keypad is grounded through circuit 1205 (BK).

Possible Causes
- circuit 66 (LB) open or shorted to ground
- circuit 1205 (BK) open
- keyless entry keypad
- vehicle security module