Re: [DML] More from the strange headlight problem

["Don Ekhoff" <ekhoff@xxxx>]

In my experience with a dual element failure, I have always found a tiny
point of rock chip damage. This is sometimes hard to see, but is large
enough for the required internal vacuum to become corrupted. Without a good
vacuum the filaments fail instantly when energized.
Don #1325

----- Original Message -----
From: "Bob Brandys" <oehcs@xxxx>
To: <dmcnews@xxxxxxxxxxx>
Sent: Friday, September 29, 2000 10:08 AM
Subject: Re: [DML] More from the strange headlight problem


> I have been working on cars a long time. Over the years I have seen both
front
> headlight fail the the same time many times. I 'm not sure what causes
this.
> However, I think a voltage spike occurs when one light fails. The
collapsing
> -15 - 20 amps fieled could flow back to the other lights since they are on
the
> same circuit.
>
> This failure also occurred on older cars with independent voltage
regulators.
> However, I have never since this on a generator car.
>
> Bob Brandys
>
>
>
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