What the alternator does, the mechanical and electrical faults it can suffer, and warning signs such as hard starting, dim headlights and a charge light.
The alternator converts mechanical energy from the engine into electricity, charging the battery and powering every electrical consumer in the car. When it fails, the battery soon runs flat and the car can be left stranded.
MSG Equipment divides alternator faults into two groups: mechanical ones such as broken mountings or bearings, and electrical ones such as winding breaks and diode bridge defects.
- Hesitant, difficult engine starting
- Dim headlights
- A charge warning light on the dashboard
Failure rarely comes out of the blue; drivers who watch for these signs can avoid costly repairs.