Transmission Control Indicator Light

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

1) Check Transmission Control Indicator Light (TCIL)

Turn ignition on. If TCIL is flashing, perform QUICK TEST procedures in SELF-DIAGNOSTICS - 7.3L DIESEL article. If any DTCs are present, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 7.3L DIESEL article and perform appropriate SYSTEM TESTS. If no DTCs are present, go to next step.

2) Check TCIL Symptom

Toggle Transmission Control Switch (TCS) on and off several times to operate TCIL. If TCIL remains on, or remains off with TCS operation, go to appropriate symptom under SYMPTOM DIAGNOSIS under TROUBLE SHOOTING in appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS. If TCIL goes on and off with TCS operation, TCIL is okay.