Date:         Sun, 12 Oct 2008 19:41:39 -0700
Reply-To:     Luke Bakken <luke.bakken@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Luke Bakken <luke.bakken@GMAIL.COM>
Subject:      Re: Both low beams burnt out at same time?
In-Reply-To:  <48F278E3.8060108@cox.net>
Content-Type: text/plain; charset=ISO-8859-1

Mark,

Thanks for the suggestion, I did not check that, but it sounds like a
useful test for the future.

I did check for resistance with an ohm meter on the filaments of the
bulb and found that the low beam filament was showing an open circuit
on both bulbs - visual inspection of the filament shows that it looks
OK, however (but I'm assuming an ohm test is definitive). I'm assuming
that both filaments in the bulbs should be showing no resistance,
correct?

Thanks,
Luke

On Sun, Oct 12, 2008 at 3:23 PM, mdrillock <mdrillock@cox.net> wrote:
> Did you measure for voltage at the low beam connectors with the bulbs still
> plugged in? If not, the bulbs might still be good. The voltage can read fine
> with no load but drop to almost nothing while trying to light the filaments
> if the wiring doesn't allow enough current flow due to a cooked connection
> along the way.
>
> Mark
>
> Luke Bakken wrote:
>>
>> Hello Vanagon list,
>>
>> I've been a lurker here since purchasing an '89 Westy Syncro last
>> March and I've learned a LOT about my van just by following this list.
>>
>> A couple weeks ago my low beams both went out and I have just
>> diagnosed the problem as *both* bulbs low-beam filaments gone bad. How
>> common is this situation? The van has a Van-Cafe relay kit installed
>> and I checked that out thoroughly with my voltage tester and
>> everything appears to be working OK - the low beam filament gets power
>> at the headlight bulb plug and then the high beam filament gets power
>> when the high beams are turned on. I'm assuming the correct behavior
>> is for the low beam side to switch off when the high beams come on.
>>
>> The main thing that I noticed while testing all this out is that there
>> are two places where it appears that the circuit overheated. The first
>> place is where the high-beam relay was spliced into the white wire
>> between the high-beam switch and the fuse - the splice itself is
>> browned a bit. The second place is on the neutral wire side of the
>> left-front headlight plug - it is pretty blackened as well. When the
>> van was upgraded with the relay kit and higher wattage bulbs should
>> the plugs have been upgraded as well? The Van-Cafe web site mentions
>> this: "We also recommend cleaning up ground connections for you
>> headlight wiring harness as poor grounds are common cause of burnt
>> wiring/connectors, whether using stock or high output bulbs." I'm
>> assuming this could have been a cause of all this as well.
>>
>>
>> http://www.van-cafe.com/home/van/page_451_584/hella_9004_80100_watt_low_beam.html
>>
>> Thanks a lot!
>> Luke
>>
>> P.S. - who runs gerry.vanagon.com? I work as a professional software
>> engineer and would be willing to help out with speeding up the vanagon
>> search archives.
>>
>>
>>
>
>
>