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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1899 (Starting System - Diesel Engine - F250-F550) >> Diagnostic Tests >> Starting System >> Pinpoint Tests >> Pinpoint Test A: The Engine Does Not Crank/The Relay Does Click >> Normal Operations

Normal Operations

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Under normal operation, power is supplied to the starter relay coil through the key switch and circuit 33 (WH/PK). A ground is supplied through circuit 329 (PK) and the PCM. When the starter relay coil is energized, the relay contacts close. This allows power to be supplied from central junction box (CJB) fuse 113 (30A) thought circuit 2037 (RD) to the relay contacts. Power then flows through circuit 113 (YE/LB) to the starter solenoid. The solenoid is grounded at the starter motor. Energizing the starter solenoid will engage the starter drive into the ring gear. It also closes the solenoid contacts allowing power directly from the battery to energize the starter motor to start the engine.

Possible Causes

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