Wiring Connectors - Engine Speed Increase

Article No. 85-12-14


ENGINE SPEED INCREASE - 3.8L
- HARNESS CONNECTIONS

FORD 1984-85 LTD, THUNDERBIRD

LINCOLN-MERCURY 1984-85 MARQUIS, COUGAR

Road splash or antifreeze (a conductive solution) entering the back of the connectors that connect the 14401 wire harness to the 14290 and to the 14289 wire harnesses can cause a short circuit. The short can cause the Idle Speed Control motor shaft to extend and result in increased idle speeds. A six-pin connector connects the 14401 to the 14289 wire harness and a 12-pin connector connects the 14401 to the 14290 wire harness.

Concerns of increased idle speeds can be serviced by cleaning both connectors and packing them with grease.

Figure 11:

Figure 12:

1. Inspect both connectors for the presence of any foreign substance. The connector configurations and locations are shown. See Figures 11 and 12.
2. Clean and thoroughly dry the connector with shop air. Pack the harness ends of each connector with Lubriplate DS-ES grease to make it moisture resistant.

3. Confirm that ISC motor is properly adjusted. (See 1985 Shop Manual, Volume H, page 4-62.)

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP144O1A85
TIME: 0.4 Hr. DLR. CODING: Basic Part No. 14401 - Code: 46