Wiring Harness
- Disconnect wiring harness connector from ignition module. Inspect connector for dirt, corrosion or damage. Disconnect wire at "S" terminal of starter solenoid.
- Attach negative voltmeter lead to distributor base. Measure battery voltage. With negative lead of voltmeter still connected to distributor base, check voltages at TFI-IV ignition module wiring harness terminals. See Fig 1. See WIRING HARNESS TEST table.
WIRING HARNESS TEST
| Connector Terminal No. |
Wire (Circuit) |
Ignition Switch Test Position |
| 2 |
Coil-Terminal |
"RUN" |
| 3 |
Run |
"RUN" or "START" |
| 4 |
Start |
"Start" |
- If all readings are at least 90% of battery voltage, wiring harness and connectors are okay. Go to STATOR test. If reading is less than 90% of battery voltage, inspect wiring harness and connectors. Also check for a worn or damaged ignition switch. Repair or replace as necessary. Turn ignition off. Remove voltmeter. Connect "S" terminal to starter solenoid.
Courtesy of FORD MOTOR CO.