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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1002 (Handles, Locks, Latches And Entry Systems) >> Diagnostic Tests >> Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test A: All Door Locks Are Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The Smart Junction Box (SJB) fuse 17 (20A) provides voltage for the power lock/unlock system. Ground for the power lock/unlock system is provided to the SJB through circuit GD182 (BK/GY). The SJB contains internal relays that are energized depending on input received.

When the SJB receives a lock request from the door lock control switch, the SJB provides power to the door lock actuators through circuit CPL11 (GY/BN). Ground for the LH front door actuator is provided through circuit CPL51 (BU/GN) and ground for the remaining door lock actuators is provided through circuit CPL52 (VT/GY). When the SJB receives an unlock request, power and ground are reversed on the previously listed circuits.

This pinpoint test is intended to diagnose the following: 

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