Headlamps - Flicker When Fog Lamps Are On

89ford23

^ HEADLAMPS-FLASH WHEN FOG LAMPS ARE ON

^ WIRING-HEADLAMP CIRCUIT-INADEQUATE GAUGE WIRE AND TERMINALS
Article No. 89-17-11
FORD: 1983-89 ESCORT 1983-87 EXP 1987-89 MUSTANG

LINCOLN-MERCURY: 1983-87 LYNX


ISSUE: The headlamps may flicker on and off when the fog lamps are used for an extended period. This may be caused by overheating of the headlamp circuit # 15.

ACTION: Install new wiring, terminals, headlamp and dimmer switches. Refer to the following procedure for service details. Refer to the following application charts for correct parts usage.

1. Remove the headlamp switch. Refer to the appropriate Car Shop Manual, Section 32-02 for service details.
2. Inspect the switch and connector terminals of circuit # 15 for any heat damage such as discolored terminals or distorted connectors.

3. Perform normal diagnostic procedure if no heat damage is found.

4. Proceed as follows if heat damage is found:

a. Remove the terminals and wire (Circuit # 15, red/yellow) from both the headlamp and dimmer switch connectors.

b. Cut the wire as near as possible to the wire harness tape wrap and throw it away.
CAUTION: IF THE CONNECTORS ARE DISTORTED AROUND THE TERMINAL AREA, THEY MUST ALSO BE REPLACED.

c. Crimp new terminals to the correct length of 12 gauge wire and install them in the connectors.

d. Overlay the new wire along the existing wire harness and tape wrap it.

e. Install new headlamp and dimmer/ multifunction switches. Refer to the appropriate Car Shop Manual, Section 32-42 for Mustang and Section 32-40 for Escort/Lynx/EXP for dimmer switch removal and installation details.

5. Check the system for proper operation.



1987-1989 MUSTANG GT






1983-1989 ESCORT GT, LYNX RS, EXP

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
891711A All Others 1.5 Hr.
891711A Mustang 1.3 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
11654 46
OASIS CODES: 2100, 2160, 2770