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

All Locks Inoperative From One Lock Switch

Test 1 - 3:




Test 4 - 9:






SYMPTOM
ALL LOCKS INOPERATIVE FROM ONE LOCK SWITCH

POSSIBLE CAUSES
- Door lock switch - short to ground
- Door switch ground wire open
- Door switch mux wire short to voltage
- Cylinder lock switch short to ground
- Door switch mux wire open
- Door lock switch - open
- Door switch mux wire short to ground
- Remote keyless entry module - high voltage
- Remote keyless entry module - low voltage