Electrical systems

17 guides & 155 illustrations

Testing a dynamo and checking output

The dynamo is a simple direct-current generator with two output terminals. Connect the positive ...

Checking the batteries

Keep the area around the battery filler caps clean, to prevent dirt falling in when they are rem...

Using a car battery charger

A high charging rate If the charging rate is much more that 4 amps, take off the cell caps...

Checking, adjusting and refitting drive belts

How the drive belt runs The belt runs in V-pulleys and drives the generator and water pump, with...

How to test a car battery

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

Testing an alternator and checking output

Testing drive-belt tension Check drive-belt tension by pushing or pulling the belt inwards at th...

Cleaning and replacing a control box

A typical control box Generally the dynamo control box is mounted on the front wing not far from...

How to fix a dynamo

A typical dynamo The electrical connections from a dynamo are on the rear endplate. Current gene...

Replacing dynamo brushes

Use a screwdriver through the hole in the endplate to move the end of the coiled spring from the...

Removing and refitting a dynamo pulley

Using vice pads If you have to hold the armature in a vice to free the nut, pad the...

Fitting a new voltage regulator

When you have tested the charging system of a car fitted with an alternator, and the checks in Ho...

Checking battery leads and connections

Use solder wire to fill out the screw hole in a battery post if the hole is too large....

Renewing alternator brushes

Removing the brushes and cleaning the strips Unfasten the recessed bolts to remove the moulded c...

Checking the electrics with a multimeter

Overhauling a light cluster

Update your charging system

Fixing a simple light cluster

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