This is a bit of an oddity, I recently noticed I don't have low beam on the right side. I figured it was the bulb so i decided to upgrade to LED's. When i plug in the LED light, the low beam works but very very low, you can barely notice it's on, unlike the left one which works perfect. Thinking maybe it's a faulty bulb i switched them and still same thing with the right bulb, not working. checked the right headlight fuse which was fine (swapped with another just in case), still no low beam right side. Thinking maybe its a ground but apparently the headlights share a common ground, so if it was that, wouldnt all the headlights stop working. Anyone else have an issue similar to this? I have cleaned the connector and checked the wiring harness for continuity.

Poor connection in the bulb socket

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U.S. Army Retired

Connection is good, this is really an odd one, right low beam doesnt work, left running light doesnt work but both high beams work however seems dim.checked all fuses and tried swapping relays with no avail.

Could also be a bad bulb.

I once had a bulb that would go out intermittently.
Had good continuity across all circuits including the bulb filament.
Turned out that the filament was broken but while at rest would make contact.
Flicking the bulb with my finger revealed the break.

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U.S. Army Retired

Add an extra ground...direct to any nearby bolt on the chassis/engine.
You can never have too many grounds!

Otherwise you need to measure the voltages all the way into the bulb holder....with respect to the ground inside the bulb holder>

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2002 Export CRD

I checked the voltages all the way to the bulb holder, both by using negative battery terminal as ground as well as chassis, i am not getting voltage to these connections, it's not the bulbs, i swapped out bulbs, same issue .I traced wires back, doesn't seem to be any breaks in the wires. I am thinking yet hoping it's not the BCM. I also noticed I am not getting power to the license plate bulb, I am not sure if it's connected to the other bulb issue or not.

What year is it, what model? US or export? Your location? All makes a difference on the wiring diagrams.
Have you looked at the wiring diagrams?
According to the 05 WD, there is one ground for each side front headlights, so if low beam works, the ground should be good.
But they do have separate fuses for each left and right high and low beams. Have you checked all the fuses with a test light. Can't always look at a fuse and tell if it is good or bad.
Fuse 26 & 27 for high beams (10amp)
Fuse 4 & 5 for low beams (10amp)
I would suspect a fuse or bad connection somewhere before thinking BCM due to the fact that if one side HB comes on, the control circuit is functioning correctly as there is only one relay for high beams and one for low beams. So if one HB comes on, the stalk switch / control circuits are operating the relay correctly.
But these things do have some screwy wiring.....

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
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Week's BatteryTray
No FCV/EGR
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2mic.Sec.Fuel Filter
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Sounds like a fuse or wiring problem.

Need the year/model number so I can get into the wiring diagrams to offer any further assistance.

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2002 Export CRD

Ok now right running light is normal but left is very dull. Both low beams are good but left high beam doesn't work at all. It's a 2006, living in Canada but production plant was in Toledo Ohio

The 2006 LHD CRD has a known issue of the Fuel Filter Head Mounting Bracket damages the large cable harness running behind it. You need to remove this bracket and check the cabling behind it for any chaffing to chassis or to another random wire. The wiring from the fuse/relay panel inside the cabin enters the engine bay here.

I presume it has the Daylight Running Lights option as is usual on Canadian models ie. is this what you refer to as a running light. Check the interior fuse panel to see if there is a large robust relay fitted in the top left slot.

This is relevant for when you climb into the wiring diagrams

Download the 2006 Jeep KJ Service Manual here, Section 8W has the wiring diagrams.

http://www.colorado4wheel.com/manuals/Jeep/KJ

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2002 Export CRD

Thanks, I checked the harness behind the fuel filter. I even changed the Multifunction switch because there were 2 wires i noticed that were nearly rubbed through, thinking maybe a switch issue. All to no avail. One thing i did notice however, when i disconnected the negative terminal to swap out the multifunction switch (didnt want to chance setting off the airbag working on the steering column lol) and reconnected the terminal, I was back to square 1 with just one low beam (left) and then opposite high beam (right). So i disconnected the negative terminal again for 10 minutes and reconnected it, voila! i have both low beams but still only one high. I am thinking maybe a computer issue?

You need to make use of the wiring diagrams Section 8W in the link I posted for the 2006 Jeep KJ Service Manuals and trace the voltages back to the supply.

LED lamps can have weird issues sometimes.....try plugging some normal bulbs in place and see what happens. If you really want LED lights you can do what I did when I fitted 100 W halogen lamps to my Jeep. I cut the wires going to the lamps up front and fitted 4 relays..one for Left High Beam, one for Left Low Beam and then the same for the other side.....right near to where the bulbs are mounted. So operating the light switches energized the relays.

I then fitted thick wires going through the relay contacts to +12 volts at the battery running through inline fuses and these thick wires in turn fed the high amperage bulbs.

Worked fine but 100 W bulbs were then banned in SA so I removed all the above and fitted good quality 65 W Halogen bulbs. Also modified the orientation of the bulb holder...my RHD KJ had the lamp lights hitting the pavement at an angle of about 30 degrees so as to highlight any pedestrians walking to the left on the sidewalk. I melted the plastic holders to change the angle to about 10 degrees. The type of lamps that we use in our Export models are completely different to the USA models.

We KJ owners with the Export Models...don't know about Canada models...have the height adjustment feature whereby the driver rotates a knob on the dashboard and this lifts or lowers the beams which is useful when having a large load in the rear of the Jeep.

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2002 Export CRD

I traced the wires back with the diagram, everything is fine. I also bought new regular non LED bulbs. It seems like whenever i disconnect the battery for awhile and reconnect, i get a different light sequence. So right now I have left low beam with no right low beam. I have right high beam but the left stays on low beam. When the running lights are on, the right is bright but left is low. Everything up here in Canada is Bass Ackwards I think i might just run a low beam wire across to each bulb and same with high beam, then the lights should work "Properly".