Fog lights and high beams work, but not the low beams

I would check for the groundwire continuity

Driver side - dim low beams and no hi beam - Subaru Outback ...

www.subaruoutback.org > ... > General > Electrical & Electronics

Oct 11, 2014 - Hi everyone, My drivers side headlights are dim on low, (car has separate bulbs ... When the headlight switch is turned ON, but for low beams, ...

Driver-side Low beam Not Working (electrical issue not bulb ...

www.hummer4x4offroad.com/.../showthread.php?...Driver-side-Low-be...

Mar 12, 2015 - 10 posts - ‎4 authors
The high beam continues to work on both sides...I pulled the Driverside headlamp fuse and then both left and right beams lit up but very dim.

High beams ok, but not low beam - one side only - TDIClub Forums

forums.tdiclub.com > ... > VW MKIV-A4 TDIs (VE and PD)

Jan 23, 2014 - My driver's side lights are working fine - high and low beams. ... But it definitely looks like the big lamp on the driver's side gets brighter when ..... Drivers side headlight is very dim on low beam and goes out when on high beam ...

Dim driver's side headlight (low & high beam) - GrandAmGT.com Forum

www.grandamgt.com > ... > Technical Q&A

Dec 11, 2002 - 6 posts - ‎4 authors

Did you check the bulb's ? Fuse's ? Just the right side reverse light doesn't work ?

Check your connections at the wiring harness going to headlights for corrosion, sounds like high resistance somewhere, also make sure your ground wires are secure. It wouldn't be the alternator or the battery would be dead and not start the engine. Also shouldn't be any condensation in your head light assembly's or will cause bulbs to blow prematurely.

I would first check the bulbs to see if they are blown on the low-beam tungsten coils, if the bulbs are fine, then check the fuse and relay. If the fuse is good, pull the the low-beam relay (if equipped) and swap it with another "like" relay, ie: fog lamp relay (if equipped). Or something not important during this test, like the A/C cooling fan relay. If all that checks out, then I would move on to diagnosing the multi-function switch.


I hope this info helps!
~subyguru~

Make sure the high beam realay under the hood fuse box is working. You can swap the hi beam relay with the horn relay to test. The hi beam filiament in the bulb can be open too.

check the bulbs first and also the fuses theres a fuse for each side and for low and high beams, start there, good luck.

I had the same problem with my 2001 Forester. Try this as a low-cost and easy repair attempt: buy brand new fuses and replace both L/H and R/H fuses. If one of your fuses is marginal, your headlights will exhibit this problem. Replacing my headlight fuses with brand new ones solved my situation.

Below is a link for the wiring diagram you requested:

2002 Subaru Outback Wiring

there are individual fuses for each side headlamps,both are 15amp located in fuse box underhood,check em out

Check the Headlight Switch. If your headlights come on automatically check the headlight sensor and its associated relay.