Ground Circuits
Turn ignition switch to OFF position. Locate and disconnect compuvalve 64-pin connector. See COMPUVALVE LOCATION table. Check continuity between chassis ground and compuvalve connector terminals No. 57, 59, 61, 62, 63 and 64. See Fig 1. If continuity does not exist, repair open in affected ground circuit. See appropriate WIRING DIAGRAMS article. If continuity exists, go to next step.
COMPUVALVE LOCATION
| Application | Location |
|---|---|
| Econoline | Rear Of Engine Under Hood |
| F150 Pickup | Right Rear Corner Of Engine Compartment |
| F350 Super Duty Pickup | Rear Of Engine Under Hood |