Speed Control - Clicking/Buzzing Noise

90ford18
^ SPEED CONTROL - "CLICKING" OR "BUZZING" NOISE

^ NOISE - "CLICKING" OR "BUZZING" FROM SPEED
CONTROL

Article No. 90-12-10

FORD: 1989-90 THUNDERBIRD

LINCOLN-MERCURY: 1989-90 COUGAR




ISSUE: A "clicking" or "buzzing" noise may come from the speed control system. It starts from the servo solenoids when the SET/ACCEL button is first engaged. The noise may be transmitted from the servo bracket through the body sheet metal.

ACTION: Install a rubber noise isolation pad between the servo and the servo bracket. Refer to the following service procedure.

1. Remove the servo and bracket assembly. Refer to the 1989/90 Thunderbird/Cougar Shop Manual, Section 37-05 for service details.

2. Remove the bracket from the servo.

3. Using a 5/8" (15.875 mm) drill, enlarge the two existing bracket holes which are used to attach the servo to the bracket, Figure 1.

4. Install a rubber isolation pad (E3ZZ-9F770-A) between the servo and bracket.

Figure 1:

5. Install two (2) eyelets (E3ZZ-9F769-A) on the isolation pad from the side opposite the servo, Figure 1.

6. Attach the bracket/isolator assembly to the servo.

NOTE: IF THE VEHICLE WAS BUILT WITH SERVO (PART NO. STAMPED ON PART, E9SF-9C735-AA/AB/AC - BLACK COLORED BACKPLATE), REPLACE IT WITH SERVO (FOSZ-9C735-A) WHICH HAS A GOLD COLORED BACKPLATE. IF THE VEHICLE IS EQUIPPED WITH SERVO (FOSF-9C735-AA STAMPED ON PART), REUSE THE SERVO.

7. Reinstall servo. Refer to the 1989/90 Thunderbird/Cougar Shop Manual, Section 37-05 for service details.

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
901210A Install Isolation Pads 1.0 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
9C735 56
OASIS CODES: 2900, 7100, 7113