Topaz FWD L4-140 2.3L CFI (1987)
Citizens Band Radio (CB): All Technical Service Bulletins
Radio/Two-Way Communications - Whine/Buzz
Article No. 91-17-5
08/21/91
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FUEL SYSTEM - FUEL PUMP "WHINE/BUZZ" NOISE COMES THROUGH ENTERTAINMENT OR TWO-WAY
COMMUNICATION RADIO
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RADIO - ENTERTAINMENT OR TWO-WAY COMMUNICATION - "WHINE/BUZZ" NOISE CAUSED BY FUEL PUMP
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NOISE - "WHINE/BUZZ" - COMES THROUGH ENTERTAINMENT OR TWO-WAY COMMUNICATION RADIO
FORD:
1984 THUNDERBIRD
1984-85 MUSTANG
1984-86 LTD
1985-87 TEMPO
1986-89 TAURUS
1987 EXP
1987-90 ESCORT
LINCOLN-MERCURY:
1984 CONTINENTAL, COUGAR, MARK VII
1984-85 CAPRI
1984-86 MARQUIS
1985-87 TOPAZ
1986-89 SABLE
1987 LYNX
LIGHT TRUCK:
1985-87 RANGER
1985-88 BRONCO, F-150-350 SERIES
1986 AEROSTAR
1986-87 BRONCO II
1986-91 ECONOLINE
ISSUE:
A "whining/buzzing" noise may come from the entertainment or two-way communication radio on vehicles with an in-tank electric fuel pump.
This occurs because of electrical interference from the fuel pump.
ACTION:
Install a noise filter kit (E7PZ-9B357-A) consisting of an RFI noise filter, electrical terminals and a piece of shrink tubing. Refer to the
following service procedure.
1.
Remove the fuel pump/sender unit from the fuel tank. Refer to the appropriate Shop Manual for removal procedure.
2.
Disconnect the heavy red and black wires from the pump terminals.
3.
Inspect the fuel pump electrical terminals.
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If the fuel pump has threaded terminals, go to Step 4.
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If the fuel pump has spade terminals, go to Step 7.
