Date: Wed, 30 Aug 2000 21:57:55 -0400 From: Four Weis <mweinopsamcom> Subject: Re: Saab 1999 9-5 Headlights
Andrew Stephenson wrote: > In article <gjNq5.14$gg.16755nopsamoon.southeast.rr.com> > Tsykesnopsamd.rr.com "Ask The MasterTech" writes: > > > Have your dealer shut off the Daytime running lights. If you do > > this you will save the bulbs as well. Daytime running lights > > means that your lights are on all the time which makes you > > replace your bulb significantly more often. [...] > > I am puzzled by this. Surely SAAB are no worse at choosing and > using their lamp bulbs than Volvo are. Yet my Volvo 440, at five > years old and with always-on running lights, has needed one front > and one rear sidelight replaced. (Maybe I'll get a flock of dead > bulbs tomorrow. <g>) Admittedly it has only done some 38,000 mi; > but if this problem is "known" for some SAABs (stated in another > posting), we must be allowed to wonder at what's happening. > > Life shortens if a bulb is run above its rated voltage. Could > (accidentally) designed-in defective voltage regulation be to > blame? Believe it or not, under-current will also shorten the life of a halogen light bulb. The Volvo V70 series also had a problem with burned out lights, but this was attributed to a poor design of the sockets which allowed the bulb to bounce around. My Saab 900 also burned out one headlight bulb a year for the 16 years I owned it, while my Volvo 245 has only need two headlights replaced in 18 years. Could there be some relationship to the stiffness of the suspension bulb burnout? The filament would get bounced around more in the Saabs because of the suspension. > > -- > Andrew Stephenson
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