Tempo L4-122 2.0L DSL (1984)
Amplifier: All Technical Service Bulletins
Radio - Noise On Units With Premium Sound
Article No. 85-6-4
(Supercedes 84-17-6)
RADIO - NOISE ON UNITS WITH PREMIUM SOUND
FORD 1984 TEMPO, CROWN VICTORIA, 1985 CROWN VICTORIA
LINCOLN-MERCURY 1984 TOPAZ, GRAND MARQUIS, MARK VII, CONTINENTAL, 1985 GRAND MARQUIS
A condition of radio noise may exist on some vehicles which may be caused by charging system or electric fuel pump whine or by other electrical
interference. The Mark VII/Continental may be more susceptible to fuel pump whine while the other vehicles may exhibit alternator whine. To service
the above condition, the following procedure should be performed:
1.
Remove the antenna cable from the radio.
^
If the noise/whine goes away, refer to Shop Manual Section 35-01 for further diagnosis.
^
If the noise/whine is still present, then proceed with Step No. 2.
2.
The amplifier should be removed and sent to the authorized Ford service station for modification. The modified amplifier will have the necessary
circuitry modification and pig-tail wire with a ring
lug (#10 hole) crimped to the end. This ring lug should be securely attached to the vehicle seat back reinforcement with a self-tapping 3/8" long #10
conductive finish screw, Part No. N801846-S36MG (it will be necessary to drill a pilot hole in the reinforcement).
3.
With the addition of the plastic feet on the Mark VII amplifier, it will be necessary to re-locate one of the existing mounting holes in the package
tray to reinstall the amplifier.
OTHER APPLICABLE ARTICLES: 84-16 (Supercedes 84-17-6) WARRANTY STATUS "INFORMATION ONLY"
