LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2004 >> Excursion 6.0 P, RWD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Charging System - Generators & Regulators - Excursion, F250-F550 Super Duty (Diesel With Single Generator) >> System Tests >> Test H: Radio Interference
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test H: Radio Interference

NOTE: If the Original Equipment Manufactured (OEM) audio unit has been replaced with an aftermarket unit, the vehicle may not pass this test. Return the vehicle to OEM condition before following this pinpoint test.

  1. Verify Generator Is Source Of Radio Interference

    Start engine and let idle. Tune radio to station where interference is present. Turn ignition off. Disconnect generator 3-pin harness connector. Start engine and let idle. Is the interference present with the generator disconnected? If yes, diagnose the in-vehicle entertainment system. If no, replace generator. See GENERATOR  under REMOVAL & INSTALLATION. Test the system for normal operation.
scientia non olet · About LEMON Manuals