A mechanism (vacuum or hydraulic) that increases the braking effort applied by the driver.

Part of drum brake carrying linings.

The force applied to the brakes.

Forces that are caused by braking.

A terminal box for carrying out diagnostic tasks on electrical and electronic systems.

A type of rectifier using four or more diodes to give full wave rectification.

A characteristic of undercoat performance that occurs when a scratch or surface imperfection is not completely filled, leaving a cavity underneath. It i caused by under-reducing the primer or using too fast a solvent and can lead to the appearance of sand scratches in the finished repair.

The formation of a metallic-appearing haze on a paint film.

A plate used to hold brushes in contact with a commutator.

Pieces of carbon or metal ending in wires or strips. Contacts onto rotating slip-rings or generator/motor commutators.