This is bugging me and getting expensive...
I've had my 92 Teg for 8 years and this is a new one.
The drivers side low beam filament burns out after 2 months.
No mods to the electrical system except for a stereo and alarm. (no amp)
Passenger's side headlamp and all other bulbs are fine. All are OEM except the headlamp which was working when I replaced them with Sylvania XtraVisions.
Matter of fact, I'm using the old OEM headlamp until I get this figured out or it burns up. All suggestions welcome.
Thanks.

 

Bad bulb ?
I had the same prob. with Navar bulb on my 90 Teg.
Bulb went out after 2weeks.
Funny thing at the time I thought it was the wire shorting somewhere.
Wasted 1/2 hour trouble shooting wiring, fuses ect.

 

nope...
I replaced 3 bulbs on that side in the past year.
Passenger's side is fine. Same bulb for 6 years.

 

Ya know, i had the same problem(sort of) on my G3 Teg. I went through like 3 sets of headlights on my trivers side in about 2 months. Finally i just put the stock bulbs back in and no problems since. Weird, but it was good because i realized hyper blues sucked