> Interesting - I would have figured they would be wired so that multiple
> failures still allowed the lamp to function.

Maybe a LED on the dash to say a LED in the headlight has failed ;-))

> http://www.usatoday.com/money/autos/2006-10-31-headlight-usat_x.htm

> They also have to be wired so that if one tiny LED fails, the whole
> light goes out. NHTSA says that prevents motorists from unknowingly
> driving with reduced illumination

Say one headlight goes out and you get pulled over in the next 5
minutes by a cop for that. A time and date stamp on the failure
would be nice, so you didn't get a ticket

I can see their reasoning. On a consumer program a few years ago
was this story. A woman was booked in for a driving test and had
paid the $80 for the appointment. Before the test, the examiner
checked the car and failed it because the rear window brake light
didn't go on. Both tail brakes were OK. She explained that she'd
bought the high light the day before but hadn't connected it yet. She
lost the appointment and the $80, and was appealing, through the
program, to get the $80 back. The answer was that if there's a brake
light there, other drivers expect to see it go on, so she didn't get
the $80 back. It didn't matter that the car had functioning factory
brake lights

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