Operation CHARM: Car repair manuals for everyone.

Turn Signal Reminder

The BCM sounds the turn signal reminder once per each flash of the turn signal lamps when the following conditions are met:
^ The ignition switch is in the RUN position.
^ The turn signal switch is in either turn position, sensing, within 1 second, an open to B+ transition in one of the following circuits:
- CKT 18
- CKT 19
^ The vehicle has traveled a distance of 1.2 km (3/4 ml) by counting pulses on the vehicle speed input CKT 389.

The BCM keeps active the turn signal reminder until one of these conditions is met:
^ The ignition switch is turned to the LOCK position or to the OFF position
^ The turn signal switch returns to the OFF position, sensing, within 1 second, no transitions from open to B+ in either of the following circuits:
- CKT 18
- CKT 19