Ground Circuits
Turn ignition off. Disconnect PCM 104-pin connector. See PCM LOCATION table. Using DVOM, check for continuity between chassis ground and specified PCM connector terminals. See IDENTIFYING PCM PWR GROUND TERMINALS table. See Figure or Figure . If continuity exists, see POWER CIRCUITS . If continuity does not exist, repair open in affected ground circuit. See ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
PCM LOCATION
| Application | Location |
|---|---|
| Crown Victoria | Behind Left Kick Panel, Near Instrument Panel |
| Econoline | Left Rear Of Engine Compartment, Near Brake Master Cylinder |
| F150 Pickup | Right Rear Of Engine Compartment |
IDENTIFYING PCM PWR GROUND TERMINALS
| Application | PCM Ground Terminal No. |
|---|---|
| Crown Victoria | 3, 25, 51, 77 & 103 |
| Econoline | 3, 24, 25, 51, 76, 77 & 103 |
| F150 Pickup | 3, 25, 51, 76 & 103 |