Pinpoint Test S: Radio Interference

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

S1 VERIFY THE RADIO INTERFERENCE FROM UPPER GENERATOR
NOTE: If the original equipment manufactured (OEM) radio unit has been replaced, the vehicle may not pass this test. Return the vehicle to OEM condition before following this pinpoint test.
- Key in START position.
- Start and run the engine. Tune the radio to a station where the interference is present.
- Key in OFF position.
- Disconnect: Upper Generator C102a.
- Key in START position. Start and run the engine.
- Is interference present with the upper generator disconnected?
- Yes : GO to S2.
- No : INSTALL a new upper generator. REFER to GENERATOR AND REGULATOR . TEST the system for normal operation.
S2 VERIFY THERE IS RADIO INTERFERENCE FROM THE LOWER GENERATOR
- Key in OFF position.
- Connect: Upper Generator C102a.
- Disconnect: Lower Generator C1251 a.
- Key in START position.
- Verify the interference is present with the lower generator disconnected.
- Is the interference still present?
- Yes : REFER to ENTERTAINMENT SYSTEM - GENERAL INFORMATION for diagnosis and testing of the in-vehicle entertainment system.
- No : INSTALL a new lower generator. REFER to GENERATOR AND REGULATOR . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.