03 Liberty Headlights Turning off

[FixIt]

I have a problem with a 2003 Liberty. 2WD, no DRL, no foglights. The low beams intermittently turn off while diving. I can hear the low beam relay click off when the lights turn off. Truning the switch back to parking lamp mode and back to low beam turns them back on. The literature I have looked at shows the low beam wire from the light switch to the BCM as a 'mux' wire. I am assuming this is for multiplex, but cannot find any information on the correct functionality of the switch. Does anyone know how this wire should test? Should I suspect the switch or the BCM. The BCM has a "loadshed" feature which switches the lights off 8 minutes after the ignition is turned off. I am hoping the problem is in the switch, but fear it is in the BCM. Has anyone seen anything similar?

Mark

 

[Corwyyn]

Wow, thats interesting. I think you're on the right track thinking it could be either the switch or the BCM, but you might also consider the relay. It is possible that something has gone 'wonky' in there. As for how the what reading you should get when you measure the wire, I have no idea. Good luck with the problem.

 

[FixIt]

I thought about the relay as well...I replaced it yesterday and it did not fix the problem.

 

[Gentleman]

Not sure about the Liberty but some other DC vehicles have a overload gadget built into the headlight switch, if so could be a bad switch, shorted wiring, or what I have seen a bulb where the elements shorted together.

Bob

 

[JeepJeepster]

I would take the cover off of the steering wheel and take the switch off and do some trouble shooting. There are two torx screws holding it on.

 

[jenz]

Headlights turning off-Me too!

Hi, Mark. I'm having the same problem with my 2002 Liberty. I ran across your message doing a search for answers & although I'm sorry you're having this problem, it's a relief to know I'm not alone. I'm visiting in Mississippi from California & took my car to the local dealer in this small town. They couldn't tell me what was wrong. No idea. I guess they don't have those diagnostic machines, if that's what you call them. Since I'm driving back to California next week, I'm really concerned about this problem. Driving across west Texas with unpredictable headllights doesn't sound like much fun to me. I'm hoping you may have discovered something that was helpful to you. I'd love to know so I can pass it along to the service department at a dealership in a larger city I'll be visiting later this week. I really appreciate anyting you could share.

Take care,
Jennifer

 

[MoladoGuy]

Did you refill your headlight fluid? You may have lost pressure and it emptied...
(whistle)

 

[jenz]

headlights

Phil - You're joking right...I mean, I've never heard of "headlight fluid". Any other suggestions?

Jennifer

 

[Cableguy]

Re: headlights

Phil - You're joking right...I mean, I've never heard of "headlight fluid". Any other suggestions?

Jennifer

Could be the blinker fluid that's empty and adversley affecting the headlight resevoir. :-k

Kidding, of course. O

Short of busting out the wiring diagrams and checking all the switches/relays/wiring in the system, i'd call it a dealer problem. Sounds like it may be as complicated as the BCM, or as simple as a switch.

 

[MoladoGuy]

Re: headlights

Phil - You're joking right...I mean, I've never heard of "headlight fluid". Any other suggestions?
Jennifer

I apologize for that. I just heard a prank call from our local radio station saying that to a customer of a repair shop. I was almost crashed the Jeep I was laughing so hard.

I'm wondering if your lights are turning off due to a timer delay. For instance, you can keep your low beams on, turn off the Jeep, get out and shut the door. They stay on for only a few minutes. Also, if I turn the Jeep off while parked, but leave the low beams on, I find that I have to turn the knob to parking lights, back to low beams, and then all the way down to the off position before they go out.

I hope you can find a fix to that issue. Could be the computer not properly configured or wacked.

 

[cucmd1]

I'm having a similar issue now with that same click, but thankfully it hasn't actually turned my headlights off, but it does turn my fogs off. It also just happens randomly, and will click with no lights on during the day. The vehicle is brand new, but the dealer says they can't find anything. Not to sound stupid, but what's the BCM? I'd like to know for the next round with the dealer. Thanks, cucmd1

 

[dnm45227]

I think it stands for Body Control Modual, can be found in/near the fuse box. I think someone posted an image from the factory service manual a while back. Let me do some searching and see if I can find it.

 

[dnm45227]

Read this thread it should cover some of yor questions. It even has that image of the BCM in it,

http://www.jeepkj.com/forums/viewtopic.php?t=2746&highlight=*control+modual*

 

[Gentleman]

The BCM is mounted to the left of the fuse module, the part of the fuse assembly that you can not see, you need to remove the entire assembly to get to the BCM, it may not be hard to remove but there are 3 large wiring harnesses plugging into the back and releasing some of those clips can be difficult.
I can snap a photo of the assembly if needed.

Bob

 

[styng88]

If you're interested, I have a turn signal switch set-up for a Lib. without foglights. It's the whole part of the column that the levers (washer and TS) mount.

 

[cucmd1]

I'm supposed to be getting mine back from the dealer today with the same problem fixed. They said my multi-function switch (headlight/fog/turn signal) was bad and that was causing all of the problems you described. I'll let you know if it worked.

 

[CamTom12]

I know this is an old thread, but did it work? My wife's Liberty has been doing the same thing, but only 2 or 3 times in the past 4 months

 

[valvestem]

What about the multi-function switch? I know that can be responsible for the interior lights acting up. But can't recall if anyone has had issues with the headlights being caused by the M-F-S.

 

[JeepJeepster]

I would start with the multifunction switch. Since the lights come back on if you turn the switch off then back on, thats telling me something has a bad connection.

After that I would check all grounds and maybe even rewire the headlights myself and bypass the BCM all together. Just put a relay in and use the same stalk as the switch.