Test B: Warning Indicator Is Off With Ignition On

WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Check For Fault Codes In PCM

Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Turn ignition switch to RUN position. Using NGS tester, perform Powertrain Control Module (PCM) self-test. Do generator fault codes exist? If yes, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS under SELF-DIAGNOSTIC SYSTEM. If no, go to next step.

Check Charging System Warning Indicator Operation

Turn ignition switch to LOCK position. Disconnect NGS tester. Disconnect PCM connector C1381c. PCM is located at left rear of engine compartment. Turn ignition switch to RUN position. Using a fused jumper wire, ground PCM connector C1381c terminal No. 30 (Violet wire). See Figure. Does the charging system warning indicator illuminate? If yes, go to next step. If no, see appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.

Check For Correct PCM Operation

Turn ignition switch to LOCK position. Disconnect PCM connectors. PCM is located at left rear of engine compartment. Inspect PCM connectors for corrosion and pushed out pins. Connect PCM connectors, ensuring it is connected properly. Connect all disconnected connectors. Operate system. Is the concern still present? If yes, replace PCM. If no, system is operating properly at this time.