The low beam of my 2002 Impreza's left headlamp doesn't work, but the
high beam is OK. Looking at the right (working) headlamp, it appears
that both the high and low beam come from the same bulb, i.e. it
appears that it's not the bulb that is the problem. Is this something
I can diagnose myself with a multimeter and repace?

"runcyclexcski" <runcyclexcski (AT) gmail (DOT) com> wrote

Just change the bulb...

SD

On Oct 11, 11:32*am, "Stewart DIBBS" <s... (AT) pixcl (DOT) com> wrote:
yeah, i just realized that the high and low beams are all the same
bulb. Duh!

Hi!

On Sun, 11 Oct 2009 09:07:32 -0700 (PDT), runcyclexcski
<runcyclexcski (AT) gmail (DOT) com> wrote:

As Stewart suggests, you _probably_ have a bad bulb; both hi and lo
filaments are in the same glass envelope, and share a common leg
(+12v).

If a new lamp doesn't fix things, you may have a melted headlight
connector (damned DRL's). If this is the case, you'll probably notice
when you go to replace the bulb, but do keep the possibility in mind
in any event.

If the connector is bad, you'll have to get another at a salvage yard
and graft it in. I've had to do this twice on my wife's '02 Forester;
she won't let me disable the DRL's.

If you're still not able to get it to work, email direct and I'll send
along the appropriate pages from the wiring diagram. With these and a
voltmeter, you should have no trouble isolating the fault.

ByeBye! S.

Steve Jernigan KG0MB
Laboratory Manager
Microelectronics Research
University of Colorado
(719) 262-3101