Rear Speakers - Sound Is Distorted

90ford06

RADIO - REAR SPEAKER - DISTORTED SOUND - VEHICLES BUILT FROM 8/01/88 THROUGH 11/30/89

Article No. 90-6-8

FORD: 1989-90 THUNDERBIRD

LINCOLN-MERCURY: 1989-90 COUGAR


ISSUE: The sound from one or both of the conventional rear speakers may be distorted because the speaker was twisted during installation. This can occur if...

^ There is an uneven mounting surface due to the NVH cover installed behind the speaker

^ One or more of the speaker mounting screws was over-tightened.

ACTION: Inspect the speaker to make sure four
(4) mounting screws were installed. If necessary, install two (2) additional mounting screws. Refer to the following procedure for service details.

1. Loosen the rear speaker mounting screws.

2. If the sound distortion does not go away after loosening the screws, it is not related to this concern. Refer to the 1989/90 Thunderbird/Cougar Shop Manual, Section 35-01 for additional diagnosis.

3. If the distortion is eliminated, proceed as follows:

a. Re-secure the speakers.

b. Tighten all four (4) mounting screws evenly to 5-10 lb.in. (.6-1.1 N-m).

c. If the speaker was mounted with only two (2) screws, install two (2) additional screws (56915-S2). Tighten screws evenly to 5-10 lb.in. (.6-1.1 N-m).

4. Make sure the distortion is no longer present.

PART NUMBER PART NAME CLASS

E9SZ-18808-A Speaker B
56915-S2 Screws - Pkg. of 6 S

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
900608A Correct Speaker Distortion 0.3 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
18808 56
OASIS CODES: 2200