Ground Circuits
Turn ignition switch to OFF position. Locate and disconnect PCM 104-pin connector. See POWERTRAIN CONTROL MODULE LOCATION table. Check continuity between chassis ground and specified PCM connector terminals. See IDENTIFYING PCM GROUND TERMINALS table. See Figure. If continuity does not exist, repair open in affected ground circuit. If continuity exists, see POWER CIRCUITS .
POWERTRAIN CONTROL MODULE LOCATION
| Application | Location |
|---|---|
| Contour | Right Rear Of Engine Compartment, Mounted On Cowl |
| F150 | Right Rear Of Engine Compartment |
| F350 Super Duty | Behind Left Side Of Instrument Panel, Near Brake Pedal |
IDENTIFYING PCM GROUND TERMINALS
| Application | PCM Ground Terminal No. | |
|---|---|---|
| Contour | 24, 51, 77 & 103 | |
| F-Series | ||
| F150 (5.4L) | 3, 25, 51, 77 & 103 | |
| F350 Super-Duty (6.8L) | 3, 23, 24, 25, 51, 76, 77 & 103 | |