TFI Ignition Module - Diagnostic Procedure
Article No: 82-9-14May 13, 1982
Subject:
TFI Diagnosis Procedure
FORD
1982 Escort, EXP With T.F.I. Ignition Module
LINCOLN-MERCURY
1982 Lynx, LN7 With T.F.l. Ignition Module
The start circuit operation of the Thick Film Ignition (T.F.I.) system (used in 1982 vehicles) is different than the "start" circuit operation of the DURASPARK Ignition system. During engine cranking, the T.F.I system will not begin producing sparks unless battery voltage is applied to the "start" pin of the ignition module. When the ignition switch is put into the "start" position, this voltage is simultaneously supplied to both the ignition module and the starter relay on circuit #32 (red wire with blue stripe). Unlike the starter motor solenoid, the ignition module "start" voltage is not supplied by the starter relay. If it is suspected that the T.F.l. system is not producing sparks, verify that the ignition module start line has a voltage present during engine cranking. Refer to Page 94 in the 1982 Electrical Vacuum Troubleshooting Manual for complete ignition circuit information.
Warranty Status: "Information Only"