high intensity discharge
H4 twin filament.
On a four headlight system there are two filaments for the inner lights. They have a filament for a high beam and one for a low beam.
It sounds like your low beam filament in the headlight bulb is gone. Try replacing the headlight bulb.
One filament of bulb burned out (double filamented bulb) Replace bulb
Hi beam lights only the High brightness filament of the headlight.Lo beam lights only the Low brightness filament of the headlight.DRL lights only the High brightness filament of the headlight, but at reduced current.Do you see the pattern?
Depending on the model year, you probably have one low beam bulb and one high beam bulb in each headlight.... unlike 90-94 323s that had one 2-filament bulb in each headlight.
Yes, but not more than 13 - 15 volts, or the headlight filament will burn out.
To determine if a headlight bulb is blown, visually inspect the bulb for any signs of damage or discoloration. If the filament inside the bulb is broken or appears blackened, the bulb is likely blown. Additionally, you can test the bulb by turning on the headlights and checking if the affected headlight does not illuminate. If the headlight does not turn on, it may indicate a blown bulb.
Incandescent light bulbs use a filament made of tungsten to produce light. The filament heats up when an electric current passes through it, emitting light as a result.
Probably the low beam filament in the dual beam headlight lamp is burnt out. See sources and related links below for more information on the headlight lamp.
In the filament of a light bulb in your home, you would typically find AC current since most household electricity is AC. In the headlight of an automobile, you would expect to find DC current, as cars typically use batteries that provide DC power for lighting systems.
There are two filaments in a car headlight. One is higher than the other. When you dip the lights, one filament turns off and the other turns on.