Audio System - Whining/Buzzing Noise From Speakers: Overview
Article No.02-16-4
08/19/02
^ FUEL SYSTEM - FUEL PUMP "WHINING"/"BUZZING" NOISE COMES THROUGH ENTERTAINMENT OR TWO-WAY RADIO SPEAKER
^ RADIO - ENTERTAINMENT OR TWO-WAY COMMUNICATION - "WHINING"/"BUZZING" NOISE IN SPEAKERS CAUSED BY FUEL PUMP
^ NOISE - "WHINING"/"BUZZING" - COMES THROUGH SPEAKERS OF ENTERTAINMENT OR TWO-WAY RADIO
FORD:
1990-1994 TEMPO
1990-1997 ESCORT, PROBE, THUNDERBIRD
1990-1998 MUSTANG
1990-1999 TAURUS
1990-2002 CROWN VICTORIA
1997-1999 CONTOUR
2001 TAURUS
1990 BRONCO II
1990-1996 BRONCO
1990-1997 AEROSTAR, F SUPER DUTY, F-250 HD, F-350
1990-1999 F-250 LD
1990-2002 ECONOLINE, F-150, RANGER
1991-2002 EXPLORER
1995-2002 WINDSTAR
1997-2003 EXPEDITION
1999-2002 SUPER DUTY F SERIES
2000-2002 EXCURSION, EXPLORER SPORT TRAC, EXPLORER SPORT
2001-2002 ESCAPE
LINCOLN:
1990-1992 MARK VII
1990-1994 CONTINENTAL
1990-2002 TOWN CAR
1998-2003 NAVIGATOR
2002 BLACKWOOD
MERCURY:
1990-1994 TOPAZ
1990-1997 COUGAR
1990-1999 SABLE
1990-2002 GRAND MARQUIS
1991-1997 TRACER
1997-1999 MYSTIQUE
2001 SABLE
1993-2002 VILLAGER
1997-2002 MOUNTAINEER
TSB 01-7-3 is being republished in its entirety to update the model year coverage and vehicle line coverage.
ISSUE
A "whining"/"buzzing" noise in the speakers of the entertainment radio or two-way radio on vehicles with an in-tank electric fuel pump may be caused by electrical noise from the fuel pump.
ACTION
Install an electronic noise Radio Frequency Interference (RFI) Filter (F1PZ-18B925-A) on the fuel pump inside the fuel tank. Refer to the following Test Procedure to confirm that the concern exists, then refer to the Service Procedure for repair details.
NOTE
IF THE VEHICLE HAS AN ELECTRONIC RETURNLESS FUEL SYSTEM, DO NOT INSTALL A RFI FILTER INLINE TO THE FUEL PUMP. ONLY VEHICLES WITH MECHANICAL RETURNLESS FUEL SYSTEMS (PRESSURE REGULATOR IN THE TANK), OR SYSTEMS WITH THE PRESSURE REGULATOR ON THE FUEL RAIL SHOULD BE APPROVED FOR THE RFI FILTER INSTALLATION.
NOTE
SOME LIGHT TRUCKS REQUIRE ONE (1) RFI FILTER FOR EACH IN-TANK ELECTRIC FUEL PUMP ON MULTI-TANK VEHICLES.
NOTE
THIS TSB DOES NOT INCLUDE TAURUS FLEXIBLE FUEL VEHICLES (FFVS) OR 1999 RANGER 3.0L FFVS.
TEST PROCEDURE
Fuel pump radio noise is relatively constant and changes only slightly with vehicle speed. If the frequency of the noise varies or the noise comes and goes with the vehicle speed, then it is not the fuel pump and this fix will not be effective. The following procedure will help determine if the fuel pump is the cause of the radio noise:
1. Turn on the radio before the key is turned on (assuming the radio will operate without the ignition key - you may need to put the ignition key in the Accessory position).
2. Turn the ignition key to the Run position (do not start the engine).
3. The fuel pump should run for about 1 second with the key in the Run position with the engine not running. Listen for noise in the radio. If noise is present while the pump is running and stops when the pump stops, then the noise is being generated by the pump and this procedure should help.
Parts Block
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 01-7-3
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
021604AA Diagnose And Install RFI 2.1 Hrs.
Filter 1990-1997
Thunderbird/Cougar
021604BA Diagnose And Install RFI 1.4 Hrs.
Filter 1990-1999 And 2001
Taurus/Sable
021604CA Diagnose And Install RFI 1.2 Hrs.
Filter 1992-1997 Crown
Victoria/Grand
Marquis/Town Car
021604CB Diagnose And Install RFI 1.6 Hrs.
Filter 1990-1991 Crown
Victoria/Grand
Marquis/Town Car
021604CC Diagnose And Install RFI 2.2 Hrs.
Filter 1998-2002 Crown
Victoria/Grand Marquis
021604DA Diagnose And Install RFI 1.9 Hrs.
Filter 1998-2002 Town Car
021604EA Diagnose And Install RFI 1.7 Hrs.
Filter 1990-1998 Mustang
021604FA Diagnose And Install RFI 1.6 Hrs.
Filter 1990-1998 Mustang
021604GA Diagnose And Install RFI 1.5 Hrs.
Filter 1990-1994
Continental
021604HA Diagnose And Install RFI 1.6 Hrs.
Filter 1990 Escort
021604IA Diagnose And Install RFI 0.8 Hr.
Filter 1991-1996 Escort
Tracer
021604IB Diagnose And Install RFI 1.6 Hrs.
Filter 1997 Escort/Tracer
021604JA Diagnose And Install RFI 0.8 Hr.
Filter 1997
Contour/Mystique
021604JB Diagnose And Install RFI 1.8 Hrs.
Filter 1998-1999
Contour/Mystique
021604KA Diagnose And Install RFI 2.0 Hrs.
Filter 1990-1992 Mark VII
021604LA Diagnose And Install RFI 0.8 Hr.
Filter 1990-1992 Probe
021604LB Diagnose And Install RFI 1.8 Hrs.
Filter 1993-1997 Probe
021604MA Diagnose And Install RFI 1.6 Hrs.
Filter 1990-2002 Econoline
Single Fuel Tank
021604MB Diagnose And Install RFI 2.6 Hrs.
Filter 1990-1991 Econoline
Both Fuel Tanks
021604NA Diagnose And Install RFI 2.0 Hrs.
Filter 1990-1996 Bronco
0216040A Diagnose And Install RFI 1.8 Hrs.
Filter 1991-1994 Explorer
0216040B Diagnose And Install RFI 1.5 Hrs.
Filter 1995-2002 Explorer
021604PA Diagnose And Install RFI 1.5 Hrs.
Filter 1997-2002
Mountaineer
0216040A Diagnose And Install RFI 1.4 Hrs.
Filter 1995-2002 Windstar
021604RA Diagnose And Install RFI 1.9 Hrs.
Filter 1993-2002 Villager
021604SA Diagnose And Install RFI 1.7 Hrs.
Filter 1997-2003
Expedition/Navigator
021604TA Diagnose And Install RFI 1.3 Hrs.
Filter 1990-1997 Ranger
Standard Cab
021604TB Diagnose And Install RFI 1.8 Hrs.
Filter 1990-1997 Ranger
Super Cab
021604TC Diagnose And Install RFI 1.8 Hrs.
Filter 1998-2002 Ranger
4X4
021604TD Diagnose And Install RFI 1.6 Hrs.
Filter 1998-2002 Ranger
4X2
021604UA Diagnose And Install RFI 1.5 Hrs.
Filter 1990-1997 Aerostar
021604VA Diagnose And Install RFI 1.9 Hrs.
Filter 1990 Bronco II
021604WA Diagnose And Install RFI 1.4 Hrs.
Filter 1990-1996
F-150/250/350/Super Duty
And 1997 F-350/Superduty
Rear
021604WB Diagnose And Install RFI 1.4 Hrs.
Filter 1990-1996
F-150/250/350/Super Duty
And 1997 F-350/Superduty
Front
021604WC Diagnose And Install RFI 2.1 Hrs.
Filter 1990-1996
F-150/250/350/Super Duty
And 1997 F-350/Superduty
Both Tanks
021604WD Diagnose And Install RFI 1.6 Hrs.
Filter 1998-2002 F-150
021604XA Diagnose And Install RFI 1.6 Hrs.
Filter 2000-2002 Excursion
021604XB Diagnose And Install RFI 1.6 Hrs.
Filter 1999-2002 Super
Duty F-Series: Front Tank
021604XC Diagnose And Install RFI 1.5 Hrs.
Filter 1999-2002 Super
Duty F-Series: Rear Tank
021604XD Diagnose And Install RFI 2.7 Hrs.
Filter 1999-2002 Super
Duty F-Series: Both Tanks
021604YA Diagnose And Install RFI 0.8 Hr.
Filter 2001-2002 Escape
021604ZA Diagnose And Install RFI 1.9 Hrs.
Filter 2002 Blackwood
DEALER CODING
CONDITION
BASIC PART NO. CODE
18B925 42
OASIS CODES: 205000, 207000, 404000, 702000, 702300