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Headlights keep burning out

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Headlights keep burning out - 2/25/2008 10:26:15 AM   
roc97007

 

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A friend has had a used a 1991 SAAB 9000 for a little over a year.  In January his headlights burned out.  He replaced the bulbs, and the new ones burned out in a little over a week.  Based on what we've read in the forums, (and my own suspicions) we had the regulator tested.  The output is 14 volts, which doesn't seem excessive.  Another thread talked about leaks in the headlight assembly causing short bulb life, especially in bad weather.  He's checking the enclosures for leaks, but it seems odd to me that both bulbs would go out at the same time if it was a leak. It seems like the problem *should* be electrical in some fashion, but we're not sure what else to test.  Any and all suggestions welcome.


  Ron


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RE: Headlights keep burning out - 2/25/2008 12:07:06 PM   
Roto


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did you test the voltage accross a wide RPM range?

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RE: Headlights keep burning out - 2/25/2008 2:45:27 PM   
roc97007

 

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At idle and 2K RPM.  Is this not sufficient?

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RE: Headlights keep burning out - 2/25/2008 4:36:50 PM   
Roto


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Actually it isn't...Idle against 4500RPM is a more sound test.

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1999 Saab 9-3 5-door.
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RE: Headlights keep burning out - 2/25/2008 6:46:51 PM   
hawaiisaab93

 

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it has to be something wrong with electical...NEVER EVER EVER will 2 headlights burn out at EXACTLY THE SAME TIME

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