Replacing Starter Relay - Important Precautions for Engine Control Module
Engine Control Module: All Technical Service Bulletins
Starter Relay - Replacement Precautions
Article No. 86-14-9
EEC PROCESSOR - 5.0L SEFI - POSSIBLE DAMAGE - WRONG STARTER RELAY USED
RUNS ROUGH - 5.0L SEFI - PROCESSOR DAMAGE - WRONG STARTER RELAY USED
NO START - 5.0L SEFI - PROCESSOR DAMAGE - WRONG STARTER RELAY USED
FORD 1986 THUNDERBIRD, CROWN VICTORIA
LINCOLN-MERCURY 1986 COUGAR, GRAND MARQUIS, CONTINENTAL, MARK VII, LINCOLN
CALIBRATION: All 5.0L SEFI
Replacing the starter relay on 1986 SEFI vehicles with a relay that does not contain suppression diodes will result in permanent damage to the EEC
processor. The damaged processor can cause a rough running engine or a no start condition.
It is important to check the starter relay part number prior to replacement of the relay.
The correct starter relay part number will be one of the following:
Engineering P/N Service P/N
Application
E4TF-11450-AA E5TZ-11450-A
Mustang, Continental
E5DF-11450-AA
Mark VII
E4AF-11450-AA E5AZ-11450-A Crown Victoria, Town Car
E6AF-11450-AA
Grand Marquis
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"
