Re: Headlights, fog and,taillights
 

hyundaitech wrote:

> You should perhaps begin taking your business to another dealer, then.
>
> In response to Matt, the PCM monitors voltage, but does not control it on
> the '01 Elantra. It will know when there's a voltage issue, but it won't
> be able to do anything about it (until it fries and the car won't run).
>

It won't set the MIL if over voltage is detected?

Matt

Re: Headlights, fog and,taillights
 

I think the MIL only sets for undervoltage. Go figure.

Re: Headlights, fog and,taillights
 

I think the MIL only sets for undervoltage. Go figure.

Re: Headlights, fog and,taillights
 

I think the MIL only sets for undervoltage. Go figure.

Re: Headlights, fog and,taillights
 

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.

Re: Headlights, fog and,taillights
 

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.

Re: Headlights, fog and,taillights
 

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.

Re: Headlights, fog and,taillights
 

"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

Re: Headlights, fog and,taillights
 

"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

Re: Headlights, fog and,taillights
 

"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

Re: Headlights, fog and,taillights
 

The alternator regulates system voltage. I've seen numerous cases where
the voltage regulator (inside the alternator) fails and produces too much
voltage. Most of the time the owner sees the problem and has it fixed (or
the alternator stops charging at all) prior to other electronics in the car
blowing up.

Re: Headlights, fog and,taillights
 

The alternator regulates system voltage. I've seen numerous cases where
the voltage regulator (inside the alternator) fails and produces too much
voltage. Most of the time the owner sees the problem and has it fixed (or
the alternator stops charging at all) prior to other electronics in the car
blowing up.

Re: Headlights, fog and,taillights
 

The alternator regulates system voltage. I've seen numerous cases where
the voltage regulator (inside the alternator) fails and produces too much
voltage. Most of the time the owner sees the problem and has it fixed (or
the alternator stops charging at all) prior to other electronics in the car
blowing up.

Re: Headlights, fog and,taillights
 

"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.

Re: Headlights, fog and,taillights
 

"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.