Ford 2003 Mustang Workshop Manual page 2356

test pins 71 and 97 at the EEC-V Control System
Breakout Box.
For vehicles equipped with a 3.8L engine measure the
resistance between PCM test pin 3 and test pins 71, 97,
51, 76, 77, 103, and 91 at the EEC-V Control System
Breakout Box and chassis ground.
For vehicles equipped with a 4.6L engine measure the
resistance between PCM test pin 34 and test pins 71,
97, 51, 77, 103, and 91 at the EEC-V Control System
Breakout Box and chassis ground.
For vehicles equipped with a 3.8L engine measure the
resistance between PCM test pin 49 and test pins 71,
97, 51, 76, 77, 103, and 91 at the EEC-V Control System
Breakout Box and chassis ground.
For vehicles equipped with a 4.6L engine measure the
resistance between PCM test pin 49 and test pins 71,
GO to C9 .
No
REPAIR short circuit(s).
RECONNECT all components.
CLEAR DTCs. REPEAT OBD
Tests.