Possible starter malfunctions, their causes and remedies (Electrical equipment / Battery and alternator / Ford Focus 2 2004-2010)

Cause of malfunction	Remedy
Starter does not turn on
Battery faulty	Check battery
Oxidation of battery terminals and wire ends	Strip, fasten and lubricate with petroleum jelly wire lugs and terminals
Violation of contacts in the connections, breakage of wires in the power supply and starter control circuits	Check, clean, tighten or replace the contact connections in the power supply and starter control circuits
Switch malfunction (castle) ignition	Replace switch contact (castle) ignition
Faulty traction relay	Replace traction relay
Faulty starter	Repair starter
The traction relay turns on, but the starter armature does not rotate or rotates too slowly
The battery is heavily discharged	Charge or replace the battery
Oxidation of battery terminals and wire ends	Strip, fasten and lubricate with petroleum jelly wire lugs and terminals
Weak tightening of the nuts for fastening the wire lugs on the terminals of the traction relay	Tighten nuts
Faulty starter	Repair starter
Traction relay turns on and off immediately (repetitive knocking)
The battery is heavily discharged	Charge or replace the battery
Increased resistance in the starter power supply circuit	Strip and secure wire ends. Replace defective wires
Faulty switch (lock) ignition	Replace switch contact (castle) ignition
Faulty traction relay	Replace traction relay
Starter engages but crankshaft does not turn
Faulty starter	Repair starter
Starter engages but gear does not engage
Nicks on the teeth of the drive gear or flywheel crown	Repair nicks or replace flywheel or starter motor
Starter does not turn off after engine start
Key stuck in switch (castle) ignition in position «starter*	Repair or replace the mechanical part of the switch (castle) ignition
Switch contact closure (castle) ignition	Replace switch contact (castle) ignition
Faulty starter	Repair starter
Increased noise level when rotating the starter armature
Loose starter mount	Tighten the starter mounting bolts
Damaged starter drive gear teeth or engine flywheel ring gear	Replace or repair starter, replace engine flywheel
Faulty starter	Repair starter

Possible starter malfunctions, their causes and remedies

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