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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 242 (Charging System - Generators & Regulators - Excursion, F250-F550 Super Duty (Gasoline)) >> System Tests >> Test F: Warning Indicator Flickers Or Operates Intermittently

Test F: Warning Indicator Flickers Or Operates Intermittently

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

  1. Check For Loose Connections

    Inspect all generator, power distribution and battery connections for looseness, corrosion, and loose or bent terminals. Are all connections clean and tight? If yes, go to next step. If no, repair as necessary. Test the system for normal operation.

  2. Check Fuse Connections

    Start engine and let idle. Inspect central junction box fuse No. 45 (10-amp) for looseness. Wiggle fuse connection and note warning indicator. Does the charging system warning indicator flicker? If yes, repair loose fuse connection as necessary. Test the system for normal operation. If no, go to next step.

  3. Check "A" Circuit (Orange/Light Blue Wire) Connections

    Turn ignition off. Using a fused jumper wire (15-amp) connected to positive battery terminal, backprobe generator harness connector terminal No. 3 (Orange/Light Blue wire). See Figure. Start engine and let idle. Observe warning indicator. Does the charging system warning indicator flicker? If yes, go to next step. If no, repair loose connections in circuit between generator and Gray fusible link. See WIRING DIAGRAMS . Test the system for normal operation.

  4. Inspect "S" Terminal

    Turn ignition off. Check the generator "S" terminal to make sure it is correctly mated to the generator and making good contact with the "S" terminal on the generator. See Figure. Is the "S" terminal in satisfactory condition? If yes, go to next step. If no, repair as necessary. Test the system for normal operation.

  5. Check Generator Brushes

    Remove the generator from the vehicle. See GENERATOR  under REMOVAL & INSTALLATION. Measure the resistance between the "A" and "F" terminals on the voltage regulator. See Fig 1. Is the resistance less than 5 ohms? If yes, install a new generator. Test the system for normal operation. If no, go to next step.

  6. Check For A Grounded Slip Ring

    Remove the voltage regulator. See REGULATOR  under REMOVAL & INSTALLATION. Measure the resistance between the generator slip rings. Is the resistance greater than 10,000 ohms? If yes, install a new generator. See GENERATOR  under REMOVAL & INSTALLATION. Test the system for normal operation. If no, install a new regulator. Test the system for normal operation.
Fig 1: Exploded View Of Voltage Regulator & Brush Holder
G94J32143Courtesy of FORD MOTOR CO.
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