DeVille Concours V8-4.6L VIN 9 (1994)
Radio/Stereo Noise Filter: All Technical Service Bulletins
AM Radio - Noise
GROUP REF.: Accessories
BULLETIN NO.: 479601
DATE: March. 1994
SUBJECT:
AM RADIO NOISE (REPLACE IGNITION CONTROL MODULE)
MODELS:
1993
CADILLAC ALLANTE
1993-1994
CADILLAC ELDORADO AND SEVILLE
1994
CADILLAC CONCOURS
EQUIPPED WITH 4.6L NORTHSTAR ENGINE
(RPOs LD8 AND L37; VINs Y AND 9)
CONDITION:
Some owners may experience "static" noise during the operation of their vehicle, while the radio is in use, in the AM radio band.
CAUSE:
This condition may be caused by Electro Magnetic Interference emitted from the ignition Control Module.
CORRECTION:
To repair this condition, replace the Ignition Control Module with a new capacitor equipped ignition Control Module P/N 10477276, ICM Bracket P/N
10472128, Bolt P/N 11516186 and Ground Strap P/N 12164812. The ground strap will be installed between the Ignition Control Module and the engine
block, using the following procedure:
NOTICE:
The new capacitor equipped DIS Module, Bracket, Bolt and Ground Strap must be used together to correct the "AM Radio Noise Condition." If
these components are not used simultaneously, the "AM Radio Noise" will still be present and possibly amplified.
For identification purposes, the new DIS Module Bracket used to correct this condition is silver in color and requires the use of the new ground strap.
The previous DIS Module Bracket is black in color and must not be used with the ground strap. The above mentioned components went into
production at the Hamtramck Assembly Plant 2/4/94.