Ford Mustang Forum - View Single Post - Flash to pass HIDs
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post #11 of (permalink) Old 12-01-2012
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hawkeye18's Avatar
Joined: Mar 2011
Location: Norfolk
Posts: 734

There is a shutter assembly controlled by a solenoid. The shutter comes in from the bottom part of the assembly to cut the top of the beam off. Trust me, it works that way.

When you flash the highs, the shutter is mechanically retracted by the solenoid to allow full beam projection.

The reason you see Hondas with wobbly lights is that in the olden days headlamp assemblies were mounted on bodies with plastic, which degrades, snaps, bends, etc. A lot of older cars do that.

The reason they flash is that the ballast is just giving the bulb the initial high-voltage zap (the arc). As you aren't really feeding that much current through the bulb that way, you aren't appreciably shortening its lifespan.

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