Accessories

Fitting a new speedometer cable

Speedometer failure is likely to be caused by a fault in the cable that runs from the gearbox to...

How an oil pressure gauge works

The oil pressure gauge is one of the most important instruments in a car. It acts as an indicat...

Working on the wiring system

The electrical wiring in a car is a system of colour-coded wires called the loom. Where several w...

How to test electrical circuits

If there is trouble without an obvious cause in any electrical component, test the circuit to f...

Checking and replacing fuses

When an electrical component stops working the fault may be in the component, in the electrical ...

Checking headlamps and lights

It is an offence in law not to have all obligatory lights working. Check them frequently, especia...

Fixing a windscreen wiper motor

Disconnect the battery . Remove the electrical connections from the motor , preferably labellin...

How to align headlights at home

Only a garage with special equipment can align headlamps accurately. However, you may need to d...

Fitting new headlamps

Sealed-beam headlamps are simple to change, but the way of gaining access to them varies from car...

Testing and replacing a flasher unit

There are two basic types of flasher unit. One is operated by a piece of wire or a bimetallic str...

Car horn not working?

Cars are usually fitted with a high-frequency (HF) or windtone horn as standard equipment, norm...

Checking the instruments

A car usually has up to six main instruments — speedometer and tachometer (rev counter); fue...

How to check a relay switch

If a component that is fed with electricity through a relay (See How car electrical systems wo...

Servicing the windscreen-wiper mechanism

The windscreen-wiper mechanism needs little maintenance. At service intervals drip a little oil d...

How to fix a car fan

Electric radiator-fan motors are switched on either by the ignition switch - and run while th...

Identifying and suppressing radio interference

Car radio interference originates usually in the ignition system, the charging circuit or amo...

How to fix a car heater

The car's heating system consists essentially of a motor-driven fan to blow warm air from the ...

How a speedometer works

Of all the instruments you can find on a modern car dashboard , only one is a legal requirement ...

Fixing a heated rear window

There are a number of possible causes for a rear window heater not working, including a blown fu...

How to fix an indicator stalk

The majority of indicator stalks are mounted on the side of the steering column so you can easi...

Fixing a reversing light

Reversing lights are not generally a legal requirement but they are useful. They serve two purpos...

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