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DIM
Acronym for Dash Integrration Module (GM).
Dimmer Switch
A switch that allows the driver to select either high- or low-beam operation of the headlights, and to switch between the two.
Dimple
The process of turning a hole under or down to allow the installation of a fastener.
Dimpling
The distortion of an oil-pan rail around the bolt hole.
Ding
A small dent.
Diode
An electrical one-way check valve made by joining P-material to N-material at a junction.
Diode Trio
A group of three diodes grouped together with one output used to provide rectified current to the field and voltage regulator on many internally regulated alternators.
Diolefins
An ingredient of gasoline which contribute to gum and lacquer formation in the fuel system.
DIP
Dual inline package.
Dip Stick
A thin, steel strip of metal used to measure the fluid level or quantity in the engine, transmission, or compressor.
Dipper
A small, metal scoop at the bottom of a connecting rod to scoop up oil from the pan to lubricate the bearing.
Dipper Trough
A trough aligned under the connecting rod that is fitted with the dipper.
Direct Battery Power
Power available to a circuit in the automobile directly from the battery, without an intermediate switch.
Direct Current (DC)
1.Current flow in one direction only such as the current produced by a battery.
Direct Drive
A transmission mode in which the drive shaft and engine crankshaft are at the same speed.
Direct Fuel Cell
A type of fuel cell in which a hydrocarbon fuel is fed directly to the fuel cell stack without requiring an external "reformer" to generate hydrogen.
Direct Ignition System
An ignition system where impulses are sent directly to the spark plugs by a modulator.
Direct Injection
A type of fuel-injection system that injects fuel directly into the cylinders.
Direct Injection System
See Direct-port system.
Direct-acting Shock Absorber
A double-action design controlling up and down suspension travel; it is mounted directly between the frame of the vehicle and the control arm or axle.