Ford 2003 Mustang Workshop Manual page 3912

Is the resistance less than 5 ohms?
A12 CHECK CIRCUIT 902 (YE) FOR AN OPEN
Disconnect: Lower Relay C4064.
Measure the resistance between lower relay C4064 pin 30, circuit
902 (YE), harness side and convertible top motor C4062, circuit
902 (YE), harness side.
Is the resistance less than 5 ohms?
A13 CHECK THE LOWER INPUT TO THE MOTOR
Key in ON position.
Measure the voltage between convertible top motor C4062, circuit
902 (YE), harness side and ground.
Depress and hold the convertible top switch in the LOWER
position.
Is the voltage greater than 10 volts?
A14 CHECK THE CONVERTIBLE TOP MOTOR RAISE CIRCUIT
Key in OFF position.
Measure the resistance between convertible top motor C4062,
circuit 903 (RD), harness side and ground.
Yes
INSTALL a new lower
relay. TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
Yes
GO to A14 .
No
INSTALL a new lower
relay. TEST the
system for normal
operation.
Yes
GO to A16 .
No
GO to A15 .