Ford 2003 Mustang Workshop Manual page 2357

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 50 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 50 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 64 and test pins 71,
97, 51, 76, 77, 103, and 91 at the EEC-V Control System
Breakout Box and ground.
For vehicles equipped with a 4.6L engine measure the
resistance between PCM test pin 64 and test pins 71,