Re: Radio Shack noise filter HEY BUTTFUZZ!!
Sorry, but this is long....
> 99-12. Publication Date: JUNE 7, 1999
> Article No. 99-12-9
>
> 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:
>
> 1990-93 TEMPO
> 1990-97 PROBE, THUNDERBIRD
> 1990-99 CROWN VICTORIA, ESCORT, MUSTANG, TAURUS
> 1997-99 CONTOUR
>
> LINCOLN-MERCURY:
>
> 1990-92 MARK VII
> 1990-93 TOPAZ
> 1990-97 COUGAR
> 1990-99 CONTINENTAL, GRAND MARQUIS, SABLE, TOWN CAR
> 1991-99 TRACER
> 1997-98 MARK VIII
> 1997-99 MYSTIQUE
> 1999 COUGAR
>
> LIGHT TRUCK:
>
> 1990 BRONCO II
> 1990-96 BRONCO
> 1990-97 AEROSTAR, F SUPER DUTY, F-250 HD, F-350
> 1990-99 ECONOLINE, F-150, F-250 LD, RANGER
> 1991-99 EXPLORER
> 1993-99 VILLAGER
> 1997-99 EXPEDITION, MOUNTAINEER, WINDSTAR
> 1998-99 NAVIGATOR
> 1999 SUPER DUTY F SERIES
>
> This TSB article is being republished in its entirety
> to include 1997-1999 model year vehicles.
>
> 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:
>
> 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 FLEIBLE FUEL VEHICLES
> (FFVs) OR 1999 RANGER 3.0
>
> 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:
>
> 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).
> Turn the ignition key to the Run position (do not
> start the engine).
> 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.
> SERVICE PROCEDURE
>
> Remove the fuel pump sender assembly from the fuel
> tank. Refer to the appropriate Service Manual, Section
> 24-35 for cars/light trucks and Section 10-01 for
> compact trucks, for removal procedure.
> On vehicles without a fuel delivery module, remove the
> negative and positive connectors from the fuel pump,
> <<Figure 1>>.
> a.Cut the wires to the fuel pump 76mm (3") from the
> flange of the fuel pump and discard the wires.
>
> b.Connect the RFI filter connectors to the spade
> terminal on the fuel pump.
>
> c.Cut and solder both the red and black wires of the
> RFI filter to the red and black wires of the flange.
> Use Heat shrink tubing (F5AZ-14A099-AA) over the
> solder connections.
>
>
> NOTE:
>
> HEAT SHRINK TUBING MUST BE USED OVER ALL SOLDERED
> CONNECTIONS MADE PRIOR TO THIS TSB. USE SUFFICIENT
> TUBING (ABOUT 50mm (2") OF THE SPECIFIELD TYPE TO
> ENTIRELY COVER EACH SOLDERED CONNECTION AND SHRINK
> APPROPRIATELY TO PREVENT EXPOSURE OF THE CONNECTIONS.
>
> NOTE:
>
> FOR SOME VEHICLES WITH EXTREMELY LONG FUEL PUMP GROUND
> WIRE CIRCUITS, IT MAY BE NECESSARY TO SHORTEN THE
> GROUND WIRE TO A POINT CLOSE TO THE FUEL TANK. IF THE
> GROUND IS MOVED, BE SURE IT IS SECURE AND PROTECTED
> FROM CORROSION SINCE IT IS THE OPERATING GROUND FOR
> THE PUMP. CHECK SERVICE LITERATURE (EVTM, etc.) FOR
> GROUND LOCATIONS.
>
> WARNING;
>
> ALL SOLDERING AND HEAT SHRINKING MUST BE COMPLETED
> AWAY FROM THE FUEL TANK AREA. USE A SOLDERING IRON
> ONLY FOR SOLDERING AND HEAT GUN ONLY FOR APPLYING
> SHRINK TUBING.
Wm. Warlock "71 and the long limousine in Va"
Rollingradios@aol.com
Nat. Rep for XForce/Magna Force Customer Service and Support
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