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Re: I have a 2006 Jeep Liberty and the left lowbeam is...
Possible thaat the rectifier/regulator from the alternator is faulty and producing higher voltage to damage the lamp.
Check also if the bulb holders are loose or damaged. Check the ground of the holders.
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Check the wiring on that light. Also check the bulb with a couple of wires to the battery, or swap the bulb left to right to make sure the new bulb is okay.
check ground(s) usually coming out of the harness trace back from headlight plug (on problem side ) until you find a ground coming out of harness and bolted to sheet metal in engine bay make sure there are no loose,corroded, broken ,or burnt wires
are you touching the bulbs with your fingers? the oil from your hands can/will cause the bulb to blow. its unlikely this is your total problem but something to keep in mind wear latex gloves
Try flicking the mulit-function switch high beam on and off. There has been known problems with this switch, but mostly the first place to start is with some new light bulbs.
Or possibly your low beam filaments are burnt out. You have to replace the bulbs. Each bulb has a lowbeam and a high beam filament.
2) On the inside jam there are two torx headed screws (T-15's if I
remember correctly).
3) Unscrew the two torx screws.
4) The light is now held by two mounting tabs (small spherical headed
plastic sets that go through a rubber grommet).
5) You will need to pry the light casing off (easy pressure with a good
size flat head screw driver will do the trick).
6) The light bulbs are twist mount settings inside the light casing.
7) Twist out the mount setting, change the bulbs, and reset the light
mountings.
8) To put the light casing push the light casing back on and put in the
screws. Everything else will work in reverse when it comes to assembling the
whole unit.
2006 Jeep Liberty Replacement Light Bulb Sizes
Low Beam Headlamp Bulb Size: 9007
High Beam Headlamp Bulb Size: 9007
Parking Light Bulb Size: 2825 or 3157
Front Turn Signal Light Bulb Size: 3157
Rear Turn Signal Light Bulb Size: 3757ALL
Tail Light Bulb Size: 3157
Stop Light Bulb Size: 3157
High Mount Stop Light Bulb Size: 921
Fog/Driving Light Bulb Size: 9145 or H3-55W
License Plate Light Bulb Size: 168
Back Up Light Bulb Size: 3157
Front Side Marker Light Bulb Size: 168
Ash Tray Light Bulb Size: 161
Map Light Bulb Size: 578
Dome Light Bulb Size: 578
Step/Courtesy Light Bulb Size: 906
Trunk/Cargo Area Light Bulb Size: 578
replace the bulb, highbeam and lowbeam use different filaments (on the same bulb) and lowbeam get used much more hence blow first 99% of the time leaving only a working set of highbeams
check the switch it self in the steering column mabe faulty and will need replacing. the high beam switch tend to go bad over time, some has better luck than others, it fairly easy to replace. the switch unit itself operate like a two way switch, one for flashing and other high beam.
the filament on the low beam burnt out. but the high beam didn't. You have a filament for each. 1 for high beam and 1 for low beam in the same light bulb. You need a new head light.
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