Equus 3145 - Digital Ford Code Reader (1981 - 1995) - Manual (Page 76)

Retrieving Codes
FAULT CODE DEFINITION FOR MCU SYSTEMS (65 - 66)
73 Chapter 4
CODE FAULT CODE DEFINITION
65 NOTE: "High Altitude" refers to vehicles that are
computer adjusted for high elevation operation.
I-4: (All except High Altitude): Altitude circuit is open.
I-4: (High Altitude Only): System OK.
V-6: Mid Vacuum Switch is closed constantly.
V-8: Mid Vacuum Switch is closed constantly.
66 I-6: Closed Throttle Vacuum Switch is closed constantly.
4