Test B: - Introduction
NOTE:
Enter this TEST only when directed here by TESTS C, J, or P.
TEST PIN IDENTIFICATION (WIRE COLOR)
| Test Pin No. | Wire Color | |
|---|---|---|
| Pin 1 | ||
| 2.3L PFI & 2.3L MA PFI | Yellow/Black | |
| 2.9L PFI & 2.9L MA PFI | Yellow/Black | |
| E Series Econoline/Club Wagon | Black/Orange | |
| All Other Truck Models | Yellow | |
| Pin 17 | ||
| F Series Bronco/Pickup | Pink/Light Green | |
| All Other Truck Models | Tan/Red | |
| Pin 48 | ||
| F Series Bronco/Pickup (All Engines) | White/Purple | |
| All Other Truck Models | White/Red | |
To prevent replacement of good components, be aware that the following non-EEC related areas may be at fault: battery cables and ground straps, voltage regulator, alternator, or ignition switch. This test is intended to diagnose the ECA, power relay, battery voltage and the following harness circuits:
- Signal Return
- STO
- STI
- PWR GND
- VPWR
- KAPWR
- VREF
- Ignition