Ford Mustang (1999-2004) Service Manual: External Controls (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 37 , Shift Lock for schematic and connector information.
Refer to Wiring Diagrams Cell 29 , Transmission Control for schematic and connector information.
Special Tool(s)
![]() |
73 Digital Multimeter 105-R0051 or equivalent |
Inspection and Verification
1. Verify the customer concern by operating the transmission external control.
2. Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:
Visual Inspection Chart
Mechanical | Electrical |
|
|
3. If the concern is not visually evident, determine the symptom. GO to Symptom Chart .
Symptom Chart
Condition | Possible Sources | Action |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Pinpoint Tests
PINPOINT TEST A: THE SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY
Test Step | Result / Action to Take |
A1 TEST THE BRAKE LIGHTS | Yes GO to A2 . No REFER to Section |
|
|
A2 CHECK CIRCUIT 511 (LG) FOR AN OPEN | Yes GO to A3 . No REPAIR the circuit. TEST the system for normal operation. |
|
|
A3 CHECK CIRCUIT 294 (WH/LB) FOR AN OPEN | Yes GO to A4 . No REPAIR the circuit. TEST the system for normal operation. |
|
|
A4 TEST CIRCUIT 1205 (BK) FOR AN OPEN | Yes INSTALL a new shift lock actuator. REFER to Brake Shift Interlock Actuator . TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation |
|
PINPOINT TEST B: THE SHIFT CONTROL IS OUT OF CORRECT GEAR RELATIONSHIP
Test Step | Result / Action to Take |
B1 CHECK THE SHIFT CONTROL LINKAGE | Yes GO to B2 . No REPAIR as necessary. TEST the system for normal operation. |
|
|
B2 CHECK THE TRANSMISSION SHIFT CABLE | Yes GO to B3 . No REPAIR as necessary. TEST the system for normal operation. |
|
|
B3 CHECK THE LINKAGE/CABLE FOR CORRECT GEAR RELATIONSHIP | Yes VERIFY the correct adjustment of the digital transmission range (DTR) sensor. REFER to Section. digital DTR sensor if necessary. TEST the system for normal operation. No ADJUST the transmission shift cable. REFER to Cable Adjustment . TEST the system for normal operation. |
|
PINPOINT TEST C: THE TRANSMISSION CONTROL SWITCH (TCS) IS INOPERATIVE
Test Step | Result / Action to Take |
C1 CHECK THE VOLTAGE TO THE TRANSMISSION CONTROL SWITCH | Yes GO to C2 . No REPAIR the circuit. TEST the system for normal operation. |
|
|
C2 CHECK THE TCS | Yes GO to C3 . No INSTALL a new TCS. Test the system for normal operation. |
|
|
C3 CHECK CIRCUIT 224 (TN/WH) FOR AN OPEN | Yes REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. No REPAIR the circuit. TEST the system for normal operation |
|
External Controls (Description and Operation)
The transmission shift cable transfers the transmission operating mode from
the gearshift lever to the
automatic transmission (7003). The indicated position of the transmission floor
mounted selecto ...
Cable Adjustment
1. NOTE: Make sure that the range selector lever is tight
against the rearward overdrive stop.
Place the transmission range selector lever in the overdrive
position.
2. Raise and support the ...
Other materials:
Trailer towing
WARNING: Do not exceed the GVWR or the GAWR specified on
the certification label.
WARNING: Towing trailers beyond the maximum recommended
gross trailer weight exceeds the limit of your vehicle and could
result in engine damage, transmission damage, structural ...
Brake System (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 60, Instrument Cluster for schematic and
connector information.
Refer to Wiring Diagrams Cell 97, Daytime Running Lamps for schematic and
connector information.
Special Tool(s)
73 Digital Multimeter
105-R0051 or Equiva ...
Engine Support Insulators
Special Tool(s)
3 Bar Engine Support Kit
303-F072
Engine Lift Bracket Set
303-D095 (D94L-6001-A) or
equivalent
...