Ford 2003 Mustang Workshop Manual page 3907

SECTION 501-18: Convertible Top
DIAGNOSIS AND TESTING
Convertible Top
Refer to Wiring Diagrams Cell
Special Tool(s)
Principles of Operation
The convertible top will only operate with the parking brake engaged and the ignition switch in the RUN
position. When the parking brake is engaged, the raise and lower relay coils are grounded through the
parking brake switch. The convertible top switch supplies power to the raise or lower relay coil when
raise or lower is selected. This power energizes the coil causing the relay contacts to close which
supplies battery power to the convertible top motor/pump assembly. The normal state of the relay is
connected to ground. When the raise or lower relay is operating, the other relay remains in its normal
state supplying the motor/pump ground.
Convertible Top Adjustments
The convertible top adjustments must be made by a qualified technician.
Inspection and Verification
1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Convertible top brackets and
frame
Hydraulic motor and pump
Hydraulic lift cylinders
Door and quarter window glass
adjustment
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.
103 , for schematic and connector information.
73 III Automotive Meter
105-R0057 or equivalent
Mechanical
2003 Mustang Workshop Manual
Electrical
Central junction box (CJB) Fuse 20 (15A)
Battery junction box (BJB) circuit breaker
CONV TOP (30A)
Wiring harness
Loose or corroded connections
Raise or lower relays
Parking brake switch
Convertible top switch