Test B: A Single Door Lock Is Inoperative

PINPOINT TEST B: A SINGLE DOOR LOCK IS INOPERATIVE

Normal Operation
The bussed electrical center (BEC) fuse 62 (20A) provides voltage for the power lock/unlock system. Ground for the power lock/unlock system is provided by circuit 1205 (BK) to the SJB. The SJB contains internal relays that are energized depending on input received.

When the SJB receives a door lock control switch lock command, the door lock relay is energized, supplying voltage to the door lock actuators through circuits 1328 (RD/OG) and 1383 (RD). The actuators are grounded through circuits 1329 (YE) and 1384 (LB). When the SJB receives an unlock request, the unlock relays are energized, supplying voltage and ground are reversed on the previously listed circuits.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door lock actuator
- SJB

B1-B3:

B4-B6: