Pinpoint Test S: Radio Interference

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

S1 VERIFY RADIO INTERFERENCE
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
- Key in OFF position.
- Connect: Upper Generator C102a.
- Disconnect: Lower Generator C1251a.
- 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. TEST the system for normal operation.