FIAT Uno 45 - Manual (Page 103)

9•14 Electrical system
Fault finding - electrical system
No voltage at starter motor
Ⅵ Ⅵ Battery discharged
Ⅵ Ⅵ Battery defective internally
Ⅵ Ⅵ Battery terminals loose or earth lead not securely attached to body
Ⅵ Ⅵ Loose or broken connections in starter motor circuit
Ⅵ Ⅵ
Starter motor switch or solenoid faulty
Voltage at starter motor - faulty motor
Ⅵ Ⅵ Starter brushes badly worn, sticking, or brush wires loose
Ⅵ Ⅵ Commutator dirty, worn or burnt
Ⅵ Ⅵ Starter motor armature faulty
Ⅵ Ⅵ Field coils earthed
Starter motor noisy or rough in engagement
Ⅵ Ⅵ Pinion or flywheel gear teeth broken or worn
Ⅵ Ⅵ Starter drive main spring broken
Ⅵ Ⅵ Starter motor retaining bolts loose
Alternator not charging*
Ⅵ Ⅵ Drivebelt loose and slipping, or broken
Ⅵ Ⅵ Brushes worn, sticking, broken or dirty
Ⅵ Ⅵ Brush springs weak or broken
* If all appears to be well but the alternator is still not charging, take the
car to an automobile electrician for checking of the alternator
Ignition light fails to go out, battery runs flat in a
few days
Ⅵ Ⅵ Drivebelt loose and slipping, or broken
Ⅵ Ⅵ Alternator faulty
Battery will not hold charge for more than a few
days
Ⅵ Ⅵ Battery defective internally
Ⅵ Ⅵ Electrolyte level too low or electrolyte too weak due to leakage
Ⅵ Ⅵ Plate separators no longer fully effective
Ⅵ Ⅵ
Battery plates severely sulphated
Ⅵ Ⅵ Drivebelt slipping
Ⅵ Ⅵ Battery terminal connections loose or corroded
Ⅵ Ⅵ Alternator not charging properly
Ⅵ Ⅵ Short in lighting circuit causing continual battery drain
Fuel gauge gives no reading
Ⅵ Ⅵ Fuel tank empty!
Ⅵ Ⅵ Electric cable between tank sender unit and gauge earthed or loose
Ⅵ Ⅵ Fuel gauge case not earthed
Ⅵ Ⅵ Fuel gauge supply cable interrupted
Ⅵ Ⅵ Fuel gauge unit broken
Fuel gauge registers full all the time
Ⅵ Ⅵ Electric cable between tank unit and gauge broken or disconnected
Horn operates all the time
Ⅵ Ⅵ Horn push either earthed or stuck down
Ⅵ Ⅵ Horn cable to horn push earthed
Horn fails to operate
Ⅵ Ⅵ Blown fuse
Ⅵ Ⅵ Cable or cable connection loose, broken or disconnected
Ⅵ Ⅵ Horn has an internal fault
Horn emits intermittent or unsatisfactory noise
Ⅵ Ⅵ Cable connections loose
Ⅵ Ⅵ Horn incorrectly adjusted
Lights do not come on
Ⅵ Ⅵ If engine not running, battery discharged
Ⅵ Ⅵ Light bulb filament burnt out or bulbs broken
Ⅵ Ⅵ Wire connections loose, disconnected or broken
Ⅵ Ⅵ Light switch shorting or otherwise faulty
Lights come on but fade out
Ⅵ Ⅵ If engine not running, battery discharged
Lights give very poor illumination
Ⅵ Ⅵ Lamp glasses dirty
Ⅵ Ⅵ Reflector tarnished or dirty
Ⅵ Ⅵ Lamps badly out of adjustment
Ⅵ Ⅵ Incorrect bulb with too low wattage fitted
Ⅵ Ⅵ Existing bulbs old and badly discoloured
Ⅵ Ⅵ Electrical wiring too thin not allowing full current to pass
Lights work erratically, flashing on and off,
especially over bumps
Ⅵ Ⅵ Battery terminals or earth connections loose
Ⅵ Ⅵ Lights not earthing properly
Ⅵ Ⅵ Contacts in light switch faulty
Wiper motor fails to work
Ⅵ Ⅵ Blown fuse
Ⅵ Ⅵ Wire connections loose, disconnected or broken
Ⅵ Ⅵ Brushes badly worn
Ⅵ Ⅵ Armature worn or faulty
Ⅵ Ⅵ Field coils faulty
Wiper motor works very slowly and takes
excessive current
Ⅵ Ⅵ Commutator dirty, greasy or burnt
Ⅵ Ⅵ Drive spindle binding or damaged
Ⅵ Ⅵ Armature bearings dry or unaligned
Ⅵ Ⅵ Armature badly worn or faulty
Wiper motor works slowly and takes little current
Ⅵ Ⅵ
Brushes badly worn
Ⅵ Ⅵ Commutator dirty, greasy or burnt
Ⅵ Ⅵ Armature badly worn or faulty
Wiper motor works but wiper blade remains static
Ⅵ Ⅵ Drive spindle damaged or worn
Ⅵ Ⅵ Wiper motor gearbox parts badly worn