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  #1  
Old July 25th, 2004, 09:57
Jeremy 99XJ's Avatar
Jeremy 99XJ Jeremy 99XJ is offline
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Power lock problems on '99 XJ

I've found tons of information on this for earlier XJ's but couldn't find anything specific to the newer models. Apologize if I'm hasta I have only been able to lock my driver's side door with the power lock intermittantly since I bought it. Sometimes it works fine, but others it only goes halfway and I half to lock it manually after I get out. I opened the panel and couldn't diagnose anything misaligned but perhaps wasn't going about it right. Anyone have this problem or a recommendation on how to solve it?
Thanks,
Jeremy
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  #2  
Old July 25th, 2004, 10:57
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bgcntry72 bgcntry72 is offline
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Re: Power lock problems on '99 XJ

The wires that lead from your drivers door into the body are stretched quite tight straight from the factory.
This causes intermittent speaker, window, and lock failure.
Pull the boot that covers the wires coming from the door and see if you can free up any slack to give the wires more play.
I have done this so many times its not funny.
I was on the highway with the wife last week and her window would not go up, so she opened the door at 70 mph and jiggled the wires. When she shut the door again, the window went right up.
Yours may also be a relay problem, but give this a try.
HTH
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  #3  
Old October 20th, 2010, 22:48
Boveevil Boveevil is offline
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Re: Power lock problems on '99 XJ

Quote:
Originally Posted by bgcntry72 View Post
The wires that lead from your drivers door into the body are stretched quite tight straight from the factory.
This causes intermittent speaker, window, and lock failure.
Pull the boot that covers the wires coming from the door and see if you can free up any slack to give the wires more play.
I have done this so many times its not funny.
I was on the highway with the wife last week and her window would not go up, so she opened the door at 70 mph and jiggled the wires. When she shut the door again, the window went right up.
Yours may also be a relay problem, but give this a try.
HTH
I know its old... but i was doing some searching and just laughed at what your wife did...
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  #4  
Old June 28th, 2014, 20:11
pfowler pfowler is offline
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Re: Power lock problems on '99 XJ

Reviving a thread, sorry, but I'm having a somewhat similar issue...

My question is if the actuators would still make noise if this were the cause? Only the driver's door and hatch actually locks and unlocks, the pass door switch works but doesn't budge any locks but the driver's door and hatch.
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  #5  
Old June 29th, 2014, 07:47
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Re: Power lock problems on '99 XJ

The first thing to do is to clean and lubricate the locking and latching mechanisms. Use throttle body cleaner and a light oil. I prefer a CLP type gun oil with a long lasting cleaner additive.

Cherokee door wire harness and master switch issues are common, some Google-fu work on the topics will help you diagnose and fix any issues. Actuators can be tested by applying 12 volts directly to the wire plug.
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  #6  
Old June 29th, 2014, 08:29
Gary Briggs Gary Briggs is offline
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Re: Power lock problems on '99 XJ

My rear doors have a similar problem. To unlock the you have to hit the button while simultaneously trying to manually unlock the door.

I'm hoping they are just gummed up and require a good cleaning/lube job!
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  #7  
Old June 29th, 2014, 12:02
pfowler pfowler is offline
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Re: Power lock problems on '99 XJ

Yeah I've already bypassed the window lock button to get the windows working. Thanks for the help, Tim!
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  #8  
Old June 30th, 2014, 08:09
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Bryan C. Bryan C. is offline
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Re: Power lock problems on '99 XJ

Quote:
Originally Posted by Tim_MN View Post
The first thing to do is to clean and lubricate the locking and latching mechanisms. Use throttle body cleaner and a light oil. I prefer a CLP type gun oil with a long lasting cleaner additive.

Cherokee door wire harness and master switch issues are common, some Google-fu work on the topics will help you diagnose and fix any issues. Actuators can be tested by applying 12 volts directly to the wire plug.
This will work fine on the 84 - 96 door latch and actuators.

The 97+ XJs use a different set up with a combination latch and actuator assy. Normally the gears strip out internally on the latch/actuator assy. Replacement seems to be the normal repair. If the actuators make noise but will not lock or unlock then a new latch assy is in order.
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  #9  
Old June 30th, 2014, 11:00
pfowler pfowler is offline
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Re: Power lock problems on '99 XJ

Great, "assembly" is a Greek word that roughly translates to "entire week's salary ". Nonetheless, I appreciate your input Bryan. With 235,000mi it doesn't surprise me that they're worn out.

So, to clarify, the key would still unlock the door, correct? I apologize for all the questions, it's my first xj that's had power windows and locks.
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  #10  
Old June 30th, 2014, 17:12
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Re: Power lock problems on '99 XJ

Cleaning is cheap and easy. Old gummy lubricants and embedded grime will stall out the power locks.

At 210,000 miles my 1999 door locks are clean, lubricated, and work just fine.
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  #11  
Old July 2nd, 2014, 08:03
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Re: Power lock problems on '99 XJ

This issue just started on my 2000 with 186,000 miles. I can here the relay clicking in the passenger side kickpanel when I activate the power lock switch on either the driver or passenger door, but the door lock motors are not working. I suspect a voltage drop in the circuit.
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  #12  
Old July 2nd, 2014, 16:38
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Re: Power lock problems on '99 XJ

If everything is clean and lubed, voltage drop or bent operating rods would be the next logical things to check.
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  #13  
Old August 2nd, 2014, 17:04
tsea99xj tsea99xj is offline
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Re: Power lock problems on '99 XJ

Sorry to jump in on someone else's thread,but having a similar issue that I couldnt match symptoms with using either the search function or general web searching.

99 XJ sport. Power windows/locks.

Like so many others, problem seemed to start when I pulled the front door panels to replace speakers. Since then, the front drivers door won't lock with the key, nor with the power lock switch or the remote start fob. Also won't with the inside manual switch.

I've pulled the panel and adjusted rods to no avail.

Intermittently you hear the click of the lock "engaging", but the mechanism the rod attaches to in the door doesn't move. Other times, and more often, I hear a buzzing or whirring from the lock solenoid/actuator(?) as if it's free wheeling.

I've pulled the front pass. Door, which works fine still, to compare, but can't see anything wrong or different that would make the drivers inoperable.

I can manually move the lever the door lock rod is connected to inside the door, but can't tell how/where it attaches to the actuator to see if there's a disconnect. I can also manually move the rod from the door panel end and move the lever inside the door.

Bad actuator and over-tweaked rod? I'm at a loss.
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  #14  
Old August 3rd, 2014, 10:02
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Re: Power lock problems on '99 XJ

Quote:
Originally Posted by tsea99xj View Post
..... problem seemed to start when I pulled the front door panels to replace speakers. Since then, the front drivers door won't lock with the key, nor with the power lock switch or the remote start fob. Also won't with the inside manual switch.
Should make one suspect bent or incorrectly arranged operating rods. Actuators can be tested by applying 12 volts directly to the actuator.
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  #15  
Old August 3rd, 2014, 18:59
tsea99xj tsea99xj is offline
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Re: Power lock problems on '99 XJ

I messed with the lock rod more after posting, and appears that it may have been binding/catching on the rod for the door handle. After more tweaking and testing, finally got it into a position where it will now lock and unlock with both the key, and the inside manual switch.

I spray-cleaned the actuator and spray-lubed it as well, manually working the lever inside the door that the lock rod connects to a few dozen times to allow the lube to do its job. It doesn't appear to take any more force to manually move the lever in the drivers door than it does in the passenger's, which works fine.

So still getting a buzzing/whirring sound from the drivers door lock actuator. I can "feel" the buzzing when i'm touching the lock lever and using the power switch to try to lock/unlock, so there's definitely power being applied.

Is it the connector/wires that runs along the bottom side of the door panel, and plugs in just below the lock mechanism that powers the actuator? (Probably an obvious yes as it seems to be the only source of power that runs into that part of the door, but i've been fooled before!).

Also for testing purposes, does it function the same as a power window switch, in that it applies/reverses current for locking/unlocking the door?
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