LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2012 >> Explorer Base, 2.0 9 >> Repair and Diagnosis >> Body & Frame >> Mirrors >> Rear View Mirror >> Diagnostic Routine(S) >> Diagnostic Routine C >> Pinpoint Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pinpoint Test

  1. CHECK THE EXTERIOR MIRROR LEFT AND RIGHT MOVEMENT
    1. Ignition ON.
    2. Operate the LH and RH exterior mirrors in the left and right direction using the exterior mirror control switch.

    Do both exterior mirrors move left and right? 

    • Yes: GO to 2  .
    • No: GO to  7.
  2. CHECK THE EXTERIOR MIRROR UP/DOWN MOTOR
    NOTE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended in the Special Tools table at the beginning of this information. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector. Refer to Special Tool(s) .
    1. Ignition OFF.
    2. Disconnect: Incorrectly Operating RH Exterior Mirror or LH Exterior Mirror.
    3. Ignition ON.
    4. Select the incorrectly operating mirror on the exterior mirror control switch.
    5. For incorrectly operating LH mirror, while using the exterior mirror control switch in the up, down and released positions, monitor:
      LH Exterior Mirror LH Exterior Mirror
      G08038270
      G08038270
      C516 C516
      Pin Circuit Measurement / Action Pin Circuit
      2 CPM28 (BU/BN) Test Light 1 CPM29 (GN)
    6. For incorrectly operating RH mirror, while using the exterior mirror control switch in the up, down and released positions, monitor:
      RH Exterior Mirror RH Exterior Mirror
      G08038270
      G08038270
      C601 C601
      Pin Circuit Measurement / Action Pin Circuit
      2 CPM28 (BU/BN) Test Light 1 CPM34 (WH/BN)

    Did the test light illuminate in the up and down position and not illuminate in the released position? 

    • Yes: CHECK the inoperative exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired, INSTALL a new exterior mirror. REFER to Exterior Mirror . If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to Exterior Mirror Motor .
    • No: GO to 3  .
  3. CHECK THE EXTERIOR MIRROR UP/DOWN CIRCUIT FOR A SHORT TO VOLTAGE
    1. Ignition OFF.
    2. Disconnect: Exterior Mirror Control Switch C535A (base mirrors).
    3. Disconnect: Exterior Mirror Control Switch C504 (heated mirrors).
    4. Ignition ON.
    5. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Ground
      G08038290
      G08038291
      C516 Ground
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM29 (GN)
      G08038292
      		 - Ground
    6. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Ground
      G08038293
      G08038294
      C601 Ground
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM34 (WH/BN)
      G08038295
      		 - Ground

    Is any voltage present? 

    • Yes: REPAIR the circuit.
    • No: GO to 4  .
  4. CHECK THE EXTERIOR MIRROR UP/DOWN CIRCUIT FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Ground
      G08038296
      G08038297
      C516 Ground
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM29 (GN)
      G08038298
      		 - Ground
    3. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Ground
      G08038299
      G08038300
      C601 Ground
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM34 (WH/BN)
      G08038301
      		 - Ground

    Is the resistance greater than 10, 000 ohms? 

    • Yes: For vehicles with base mirrors, GO to 5  .

      For vehicles with heated mirrors, GO to  6.

    • No: REPAIR the circuit.
  5. CHECK THE BASE EXTERIOR MIRROR UP/DOWN CIRCUIT FOR AN OPEN
    1. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Exterior Mirror Control Switch
      G08038302
      G08038303
      C516 C535A
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM29 (GN)
      G08038304
      		 6 CPM29 (GN)
    2. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Exterior Mirror Control Switch
      G08038305
      G08038306
      C601 C535A
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM34 (WH/BN)
      G08038307
      		 8 CPM34 (WH/BN)

    Is the resistance less than 3 ohms? 

    • Yes: INSTALL a new exterior mirror control switch (integral to the master window control switch). REFER to WINDOW CONTROL SWITCH .
    • No: REPAIR the circuit.
  6. CHECK THE HEATED EXTERIOR MIRROR UP/DOWN CIRCUIT FOR AN OPEN
    1. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Exterior Mirror Control Switch
      G08038308
      G08038309
      C516 C504
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM29 (GN)
      G08038310
      		 6 CPM29 (GN)
    2. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Exterior Mirror Control Switch
      G08038311
      G08038312
      C601 C504
      Pin Circuit Measurement / Action Pin Circuit
      1 CPM34 (WH/BN)
      G08038313
      		 8 CPM34 (WH/BN)

    Is the resistance less than 3 ohms? 

    • Yes: INSTALL a new exterior mirror control switch (integral to the master window control switch). REFER to WINDOW CONTROL SWITCH .
    • No: REPAIR the circuit.
  7. CHECK THE EXTERIOR MIRROR LEFT/RIGHT MOTOR
    NOTE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended in the Special Tools table at the beginning of this information. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector. Refer to Special Tool(s) .
    1. Ignition OFF.
    2. Disconnect: Incorrectly Operating RH Exterior Mirror or LH Exterior Mirror.
    3. Ignition ON.
    4. Select the incorrectly operating mirror on the exterior mirror control switch.
    5. For incorrectly operating LH mirror, while using the exterior mirror control switch in the right, left and released positions, monitor:
      LH Exterior Mirror LH Exterior Mirror
      G08038314
      G08038314
      C516 C516
      Pin Circuit Measurement / Action Pin Circuit
      2 CPM28 (BU/BN) Test Light 4 CPM26 (WH)
    6. For incorrectly operating RH mirror, while using the exterior mirror control switch in the right, left and released positions, monitor:
      RH Exterior Mirror RH Exterior Mirror
      G08038314
      G08038314
      C601 C601
      Pin Circuit Measurement / Action Pin Circuit
      2 CPM28 (BU/BN) Test Light 4 CPM31 (YE/GY)

    Did the test light illuminate in the right and left position and not illuminate in the released position? 

    • Yes: CHECK the inoperative exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired, INSTALL a new exterior mirror. REFER to Exterior Mirror . If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to Exterior Mirror Motor .
    • No: GO to 8  .
  8. CHECK THE EXTERIOR MIRROR LEFT/RIGHT CIRCUIT FOR A SHORT TO VOLTAGE
    1. Ignition OFF.
    2. Disconnect: Exterior Mirror Control Switch C535A (base mirrors).
    3. Disconnect: Exterior Mirror Control Switch C504 (heated mirrors).
    4. Ignition ON.
    5. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Ground
      G08038318
      G08038319
      C516 Ground
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM26 (WH)
      G08038320
      		 - Ground
    6. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Ground
      G08038321
      G08038322
      C601 Ground
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM31 (YE/GY)
      G08038323
      		 - Ground

    Is any voltage present? 

    • Yes: REPAIR the circuit.
    • No: GO to 9  .
  9. CHECK THE EXTERIOR MIRROR LEFT/RIGHT CIRCUIT FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Ground
      G08038324
      G08038325
      C516 Ground
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM26 (WH)
      G08038326
      		 - Ground
    3. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Ground
      G08038327
      G08038328
      C601 Ground
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM31 (YE/GY)
      G08038329
      		 - Ground

    Is the resistance greater than 10, 000 ohms? 

    • Yes: For vehicles with base mirrors, GO to 10  .

      For vehicles with heated mirrors, GO to  11.

    • No: REPAIR the circuit.
  10. CHECK THE BASE EXTERIOR MIRROR LEFT/RIGHT CIRCUIT FOR AN OPEN
    1. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Exterior Mirror Control Switch
      G08038330
      G08038331
      C516 C535A
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM26 (WH)
      G08038332
      		 5 CPM26 (WH)
    2. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Exterior Mirror Control Switch
      G08038333
      G08038334
      C601 C535A
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM31 (YE/GY)
      G08038335
      		 7 CPM31 (YE/GY)

    Is the resistance less than 3 ohms? 

    • Yes: INSTALL a new exterior mirror control switch (integral to the master window control switch). REFER to WINDOW CONTROL SWITCH .
    • No: REPAIR the circuit.
  11. CHECK THE HEATED EXTERIOR MIRROR LEFT/RIGHT CIRCUIT FOR AN OPEN
    1. For incorrectly operating LH mirror, measure:
      LH Exterior Mirror Exterior Mirror Control Switch
      G08038336
      G08038337
      C516 C504
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM26 (WH)
      G08038338
      		 5 CPM26 (WH)
    2. For incorrectly operating RH mirror, measure:
      RH Exterior Mirror Exterior Mirror Control Switch
      G08038339
      G08038340
      C601 C504
      Pin Circuit Measurement / Action Pin Circuit
      4 CPM31 (YE/GY)
      G08038341
      		 7 CPM31 (YE/GY)

    Is the resistance less than 3 ohms? 

    • Yes: INSTALL a new exterior mirror control switch (integral to the master window control switch). REFER to WINDOW CONTROL SWITCH .
    • No: REPAIR the circuit.
scientia non olet · About LEMON Manuals