CAUSE | METHOD OF ELIMINATION |
When the starter is turned on, the starter motor does not work | |
Starter or traction relay failure or defective wiring | Check for voltage at terminal 50 of the traction relay: |
| – the absence of voltage when the starter is turned on indicates damage to the electrical circuit | |
| – the presence of voltage indicates a faulty traction relay or starter | |
| - if, when the starter is turned on, voltage is supplied to the traction relay, but it does not operate (there is no characteristic click), then the traction relay is faulty (the winding is broken or shorted to ground) | |
| - the presence of a characteristic click of the traction relay indicates that the relay contacts are burnt out or that the starter itself is out of order | |
The electric motor is faulty | Check the operation of the starter motor by briefly applying voltage (with an additional large-section wire) to the traction relay contact on the motor side. If the motor starts working, then the cause of the malfunction should be sought in the traction relay |
The starter turns slowly and does not start the engine | |
The battery is discharged | Charge the battery |
The engine lubrication system contains too much thick oil | Change oil |
The graphite brushes are not sufficiently pressed against the starter motor commutator | Adjust the distance between the graphite brushes and the commutator |
Poor condition of the collector working surface and worn starter bearings | Check and, if necessary, replace worn parts |
When the ignition key is released from the position "engine start" the starter continues to work | |
Sticking of traction relay contacts | Immediately turn off the ignition and disconnect the battery, then fix the problem |
The ignition switch does not open the starter circuit | |
The original source of the publication is on the website (FordBook)