Test B: Electronic Engine Control (EC) Power Relay

NOTE
This Pinpoint Test is intended to diagnose the following:
- Harness Circuits: Vehicle Power (VPWR), Ignition Start/Run, Power Relay Ground, Battery Positive Voltage (B+)
- Power Relay

Pinpoint Test Schematics and Connectors

Focus, Contour/Mystique/Cougar:

Taurus/Sable:

LS6/LS8:

All Others:

NOTE: The IGN START/RUN and GROUND circuits, and/or the B+ and VPWR circuits may be reversed in the harness connector. Refer to the Vehicle Wiring Diagram for more information.

Pinpoint Tests