FORD MUSTANG 2003 Workshop Manual

Pinpoint Tests
PINPOINT TEST A: THE MIRRORS ARE INOPERATIVE z
Central junction box
(CJB) fuse 19 (15A).
z Circuitry.
z A single mirror is inoperative zExterior rear view
mirror control.
z Exterior rear view
mirror motor.
z Circuitry. z
Go To Pinpoint Test B .
z A single mirror does not
function with switch logic z
Exterior rear view
mirror control.
z Exterior rear view
mirror motor.
z Circuitry. z
Go To Pinpoint Test C .
Test Step Result / Action to
Take A1 CHECK CIRCUIT 326 (WH/VT)
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the voltage between exterior rear view mirror control
C527 pin 1, circuit 326 (WH/VT), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
A2 .
No
REPAIR the circuit.
TEST the system for
normal operation. A2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between exterior rear view mirror control
C527 pin 5, circuit 1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
A3 .
No
REPAIR the circuit.
TEST the system for
normal operation. A3 CHECK CIRCUIT 542 (YE) FOR AN OPEN Klj . 2 ba
82003 Mustang Workshop Manual
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PINPOINT TEST B: A SINGLE MIRROR IS INOPERATIVE z
Measure the resistance between passenger exterior rear view
mirror C622 pin C, circuit 542 (YE), harness side and exterior
rear view mirror control C527 pin 6, circuit 542 (YE), harness
side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new exterior
rear view mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section.
No
REPAIR the circuit.
TEST the system for
normal operation. Test Step Result / Action to
Take B1 CHECK THE COMMON FEED INPUT
z
Disconnect: Exterior Rear View Mirror C516 (Driver) C622
(Passenger).
z Disconnect the inoperative exterior rear view mirror C516 driver
side or C622 passenger side.
z Measure the voltage between driver exterior rear view mirror C516
pin C, circuit 542 (YE), harness side and ground; or between
passenger exterior rear view mirror C622 pin C, circuit 542 (YE),
harness side and ground.
z Select the inoperative side and actuate the exterior rear view
mirror control to the down position, then the right position.
z Are the voltages greater than 10 volts? Yes
GO to
B3 .
No
GO to B2 .
B2 CHECK CIRCUIT 542 (YE) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 6, circuit 542 (YE), harness side and driver exterior rear
view mirror C516 pin C, circuit 542 (YE), harness side; or between
exterior rear view mirror control C527 pin 6, circuit 542 (YE),
harness side and passenger exterior rear view mirror C622 pin C,
circuit 542 (YE), harness side. Yes
INSTALL a new
exterior rear view
mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section. TEST the
system for normal
operation. Klj . 3 ba
82003 Mustang Workshop Manual
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z
Is the resistance less than 5 ohms? No
REPAIR the circuit.
TEST the system for
normal operation.
B3 CHECK THE UP/DOWN INPUT
z
Measure the voltage between driver exterior rear view mirror C516
pin B, circuit 541(DB), harness side and ground; or between
passenger exterior rear view mirror C622 pin A, circuit 544 (VT),
harness side and ground.
z Actuate the exterior rear view mirror control to the up position.
z Are the voltages greater than 10 volts? Yes
GO to
B6 .
No
GO to B4 for driver
inoperative or GO to
B5 for passenger
inoperative. B4 CHECK CIRCUIT 541 (DB) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 3, circuit 541 (DB), harness side and driver exterior rear
view mirror C516 pin B, circuit 541 (DB), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
exterior rear view
mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section. TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation. B5 CHECK CIRCUIT 544 (VT) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 7, circuit 544 (VT), harness side and passenger exterior
rear view mirror C622 pin A, circuit 544 (VT), harness side. Yes
INSTALL a new
exterior rear view
mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section. TEST the
system for normal Klj . 4 ba
82003 Mustang Workshop Manual
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z
Is the resistance less than 5 ohms? operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
B6 CHECK THE LEFT/RIGHT INPUT
z
Measure the voltage between driver exterior rear view mirror C516
pin A, circuit 540 (RD), harness side and ground; or between
passenger exterior rear view mirror C622 pin B, circuit 543 (DG),
harness side and ground.
z Actuate the exterior rear view mirror control to the left position.
z Is the voltage greater than 10 volts? Yes
INSTALL a new
exterior rear view
mirror motor. REFER
to Mirror
— Motor in
this section. TEST
the system for normal
operation.
No
GO to B7 for driver
inoperative or GO to
B8 for passenger
inoperative. B7 CHECK CIRCUIT 540 (RD) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 4, circuit 540 (RD), harness side and driver exterior rear
view mirror C516 pin A, circuit 540 (RD), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
exterior rear view
mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section. TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation. B8 CHECK CIRCUIT 543 (DG) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 8, circuit 543 (DG), harness side and passenger exterior
rear view mirror C622 pin B, circuit 543 (DG), harness side. Yes
INSTALL a new
exterior rear view
mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section. TEST the
system for normal Klj . 5 ba
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PINPOINT TEST C: A SINGLE MIRROR DOES NOT FUNCTION WITH
SWITCH LOGIC z
Is the resistance less than 5 ohms? operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
Test Step Result / Action to Take
C1 CHECK THE EXTERIOR REAR VIEW MIRROR LOGIC
z
Disconnect: Exterior Rear View MirrorC516 (Driver), or
C622 (Passenger).
z Disconnect the suspect exterior rear view mirror C516
driver or C622 passenger.
z Measure for voltage or resistance at the suspect exterior
rear view mirror harness side, while actuating the
exterior rear view mirror control according to the
following chart. Circuit Exterior rear view
mirror control
position Measure for
voltage or
resistance Driver
540
(RD) Left Greater than 10 volts
540
(RD) Right Less than 5 ohms
541
(DB) Up Greater than 10 volts
541
(DB) Down Less than 5 ohms
542
(YE) Left Less than 5 ohms
542
(YE) Right Greater than 10 volts
542
(YE) Up Less than 5 ohms
542
(YE) Down Greater than 10 volts
Exterior rear view
mirror control Measure for
voltage or Yes
INSTALL a new exterior rear
view mirror motor. REFER to
Mirror
— Motor in this section.
TEST the system for normal
operation.
No
GO to C2 . Klj . 6 ba
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z
Is the circuit logic OK? Circuit position resistance
Passenger
543
(DG) Left Greater than 10 volts
543
(DG) Right Less than 5 ohms
544
(VT) Up Greater than 10 volts
544
(VT) Down Less than 5 ohms
542
(YE) Left Less than 5 ohms
542
(YE) Right Greater than 10 volts
542
(YE) Up Less than 5 ohms
542
(YE) Down Greater than 10 volts
C2 CHECK THE EXTERIOR REAR VIEW MIRROR
CONTROL z
Remove the exterior rear view mirror control. Leave the
harness connected.
z Measure for voltage or resistance at exterior rear view
mirror control C527 while actuating the exterior rear view
mirror control according to the following chart. Pin Circuit Exterior rear view
mirror control position Measure for
resistance or voltage 6 542
(YE) Left Less than 5 ohms
6 542
(YE) Right Greater than 10
volts 6 542
(YE) Up Less than 5 ohms
6 542
(YE) Down Greater than 10
volts Driver side selected
4 540
(RD) Left Greater than 10
volts 4 540
(RD) Right Less than 5 ohms
3 541
(DB) Up Greater than 10
volts 3 541
(DB) Down Less than 5 ohms
Passenger side selected
8 543 Left Greater than 10 Yes
REPAIR the circuits. TEST the
system for normal operation.
No
INSTALL a new exterior rear
view mirror control. REFER to
Switch
— Exterior Rear View
Mirror Control in this section.
TEST the system for normal
operation. Klj . 7 ba
82003 Mustang Workshop Manual
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z
Is the circuit logic OK? (DG) volts
8 543
(DG) Right Less than 5 ohms
7 544
(VT) Up Greater than 10
volts 7 544
(VT) Down Less than 5 ohms Klj . 8 ba
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REMOVAL AND INSTALLATION
Mirror —Power Exterior Rear View
Removal
1. Remove the door trim panel. For additional information, refer to Section 501 - 05 .
2. Disconnect the power exterior rear view mirror electrical connector.
3. Remove the nuts and the power exterior rear view mirror.
Installation 1. To install, reverse the removal procedure.
SECTION 501-
09: Rear View Mirrors 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Mirror —Motor
Removal
1. Push in the upper edge of the mirror glass to the maximum travel.
2. Grasp the bottom of the mirror glass, pull outward and remove the mirror glass.
3. Remove the mirror motor screws.
4. Disconnect the mirror motor electrical connector.
5. Remove the mirror motor.
Installation 1. NOTE: When installing the mirror glass, make sure it snaps completely into the mirror motor.
SECTION 501-
09: Rear View Mirrors 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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To install, reverse the removal procedure. Klj . 2 ba
22003 Mustang Workshop Manual
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