"Mike Marlow" <mmarlowREMOVE@alltel.net> wrote in message
news:34378$44878b87$452897be$30892@ALLTEL.NET...
>
> "nothermark" <trash@gnomex.cotse.net> wrote in message
> news:2d0f82p8vksnqjeg8c6qc3qbcit2jioi6t@4ax.com...
>> On Wed, 07 Jun 2006 12:54:28 -0400, "hyundaitech"
>> <notpublic@not.public.com> wrote:
>>
>> >I think the MIL only sets for undervoltage. Go figure.
>>
>> It makes some sense. The battery should be a large enough load that
>> it keeps the voltage down to a safe level for the electronics. OTOH,
>> if the voltage is too low the electronics won't work right.
>>
>> If I was losing lights and did not have another reason I could see I
>> would start looking for a bad connection to the battery or a failing
>> battery that was letting the charging voltage go a bit high. I'm
>> thinking 0.1 v ranges. Measure the voltage accross the lightbulb and
>> accross the battery posts with the engine revved up to cruising speed.
>> It should be the same or very close.
>
> For the OP - not sure if you checked this but my wife just came home with
> a
> ticket for a headlight out in our 04 Sonata. I went out and pulled the
> connector and reseated it and now the headlight works again. Did you try
> to
> reseat your connectors before buying new lamps? It used to be common for
> cars to experience this but that was mostly years ago. Can't go by my
> one-off experience, but I wonder if the Hyundai connectors are prone to
> either moisture or corrosion buildup.
>
> --
>
> -Mike-
> mmarlowREMOVE@alltel.net
>
>
This is a common failure mode for these halogen headlamps. In my case the
headlight was out until I opened the hood and then closed it. The shock of
dropping the hood 12 inches made the headlight start working again. This
"trick" worked twice in the following 3 days or so and then the light was
out for good. I thought I had a wiring or socket problem but it was the
bulb. The parts guy at the Hyundai dealership where I got the new light
bulb from said this is pretty common.