B: Electronic Engine Control (EC) Power Relay Introduction

B: Pinpoint Tests

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 (12A646)

Pinpoint Test Schematics and Connectors

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 Wiring Diagram Manual for more information.

B: Pinpoint Tests