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Home >> Mercury >> 2007 >> Milan FWD L4-2.3L VIN Z >> Repair and Diagnosis >> Body and Frame >> Mirrors >> Testing and Inspection >> Pinpoint Tests >> Test D: A Single Mirror Does Not Function With Switch Logic
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Test D: A Single Mirror Does Not Function With Switch Logic

PINPOINT TEST D: A SINGLE MIRROR DOES NOT FUNCTION WITH SWITCH LOGIC


D1-D3:






D3-D4:






D4-D5:






D5-D6:






D6 Continued:






Normal Operation
Under normal operation, the exterior mirror control switch uses circuits CPM16 (BN/BU), CPM17 (BU/GN), CPM23 (GY), CPM20 (BN/WH) or CPM21 (YE/VT) to control the exterior mirror movement.
- When ground is received through circuit CPM16 (BN/BU) or CPM20 (BN/WH) and power through circuit CPM23 (GY), the LH or RH exterior mirror glass will move right.
- When power is received through circuit CPM16 (BN/BU) or CPM20 (BN/WH) and ground through circuit CPM23 (GY), the LH or RH exterior mirror glass will move left.
- When power is received through circuit CPM17 (BU/GN) or CPM21 (YE/VT) and ground through circuit CPM23 (GY), the LH or RH exterior mirror glass will move down.
- When ground is received through circuit CPM17 (BU/GN) or CPM21 (YE/VT) and power through circuit CPM23 (GY), the LH or RH exterior mirror will operate up.

Possible Causes
- Open in circuits CPM16 (BN/BU), CPM17 (BU/GN), CPM20 (BN/WH) or CPM21 (YE/VT)
- Inoperative exterior mirror control switch
- Inoperative exterior mirror motor
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