Test G: Radio Interference

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Mercury Marauder, 2004 Mercury Grand Marquis, 2004 Ford Crown Victoria, 2003 Mercury Marauder, and 2003 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

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

Verify Generator Is Source Of Radio Interference

Start and run the engine. Tune the radio to a station where the interference is present. Turn ignition off. Disconnect: generator connector C102b (Black/Orange wire). Start engine. With the engine running, is the interference present with the generator disconnected? If yes, diagnosis in-vehicle entertainment system. If no, replace generator. See GENERATOR under REMOVAL & INSTALLATION.