Electrical systems

17 guides & 129 illustrations

Electrical systems

Checking the batteries

Most car batteries are sealed for life - apart from a small vent hole which allows gas to escape...

Electrical systems

Using a car battery charger

Frequent short trips, with constant stopping and starting, make your battery work very hard, espe...

Electrical systems

How to test a car battery

If your car's instrument panel includes an ammeter, it will tell you how well the charging syste...

Electrical systems

How to fix a dynamo

Wear on the carbon brushes and commutator is the most common cause of dynamo failure. Normally t...

Electrical systems

Replacing dynamo brushes

Removing the brushes The carbon brushes are a sliding fit in oblong holders on the dynamo endplat...

Electrical systems

Renewing alternator brushes

Unlike dynamo brushes, alternator brushes normally last for several years. Electrical arcing bet...

Electrical systems

Overhauling a light cluster

Many modern cars are now designed so that their lights are built as a one-piece unit known as a c...

Electrical systems

Update your charging system

Alternators are powerful enough to cope with the demand for current made by a modern car's electr...

Electrical systems

Fixing a simple light cluster

It is essential to keep your car lights in good working order all the time. Apart from being dan...