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  2. Trouble light - Wikipedia

    en.wikipedia.org/wiki/Trouble_light

    Trouble lights are usually powered by AC wall current, but some are powered by a 12-volt source, such as a car battery. The bulb of the trouble light typically has a heavy filament to withstand dropping, and therefore is also referred to as a drop light. [1] Newer models often use LED arrays as the light source. LEDs are more energy efficient ...

  3. List of automotive light bulb types - Wikipedia

    en.wikipedia.org/wiki/List_of_automotive_light...

    12 V: 19 W PGJ19-3 H16B 1 12 V: 19 W PGJY19-3 H21W 1 12 V & 24 V: 21 W BAY9s H27W/1 1 12 V: 27W PG13 USA ANSI № 880 H27W/2 1 12 V: 27 W PGJ13 USA ANSI № 881 HB3 1 12 V: 60 W P20d 90° USA, Japan ANSI № 9005 ECE nominal luminous flux: 1700 lm ±15% HB3A 1 12 V: 60 W P20d 180° USA ANSI № 9005XS HB4 1 12 V: 51 W P22d 90° USA, Japan

  4. Check engine light - Wikipedia

    en.wikipedia.org/wiki/Check_engine_light

    A check engine light or malfunction indicator lamp (MIL), is a tell-tale that a computerized engine-management system uses to indicate a malfunction or problem with the vehicle ranging from minor (such as a loose gas cap) to serious (worn spark plugs, engine problems or a faulty oil valve, etc.).

  5. LED circuit - Wikipedia

    en.wikipedia.org/wiki/LED_circuit

    Simple LED (Light Emitting Diode) circuit diagram. In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.

  6. On-board diagnostics - Wikipedia

    en.wikipedia.org/wiki/On-board_diagnostics

    The OBD-II specification provides for a standardized hardware interface — the female 16-pin (2x8) J1962 connector, where type A is used for 12-volt vehicles and type B for 24-volt vehicles. Unlike the OBD-I connector, which was sometimes found under the bonnet of the vehicle, the OBD-II connector is required to be within 2 feet (0.61 m) of ...

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