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Unread 10-20-2013, 03:50 PM   #1
Malachi73
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Door locks not working right

Hi, I have a 1998 Grand Cherokee Laredo with power door locks. I just bought the Jeep and noticed that when I hit the switch to lock the doors, only the front doors lock, not the rear or hatch. Also, when I hit the unlock switch, the passenger front does not unlock, but all others unlock.

Can anyone help me with this? If you need more info, I will gladly provide it, just ask.

Thanks.

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Unread 10-20-2013, 05:12 PM   #2
ashland82391
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Unread 10-20-2013, 05:35 PM   #3
Muzramp
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I'll like to know this time. I haven't gotten around to taken apart my door
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Unread 10-20-2013, 06:02 PM   #4
xcaliber81
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Start with whags easiest and check the front door harnesses in he boots. Just pull it back enough to see if theres broken wires its the most common.
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Unread 10-21-2013, 02:03 PM   #5
Malachi73
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Ok. Are you meaning to check on each door, or just the driver door?
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Unread 10-21-2013, 02:14 PM   #6
V65Ozzie
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I've noticed my drivers door doesn't always lock, it's the ignition switch, because when I wiggle it, the lock starts to work again, but, thats only my drivers door. I can also remove my key in the run position, so I'm pretty sure it's worn out.
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Unread 10-21-2013, 07:16 PM   #7
xcaliber81
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Quote:
Originally Posted by Malachi73 View Post
Ok. Are you meaning to check on each door, or just the driver door?
Both front doors. They get used the most.
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Unread 10-21-2013, 07:18 PM   #8
xcaliber81
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96+ has a door lock module that would probably be the next culprit after a broken wire.
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Unread 10-27-2013, 08:53 PM   #9
Malachi73
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Ok, I've checked both front doors harnesses and cannot find any broken wires.

I also noticed two things.

1) At night, if I press the door lock switch, my head lights and instrument panel lights dim quite a bit. Is that normal?

2) I can lock and unlock the right front door by pressing the lock switch, but as I was messing with it to see why the back doors were not working I noticed that if I kept pressing the switch several times back and forth, the right front would get weaker and weaker till it just quit working altogether, until I let it sit a few minutes, then it would start working again, almost like something was over heating.

Any thoughts?
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Unread 11-07-2013, 07:59 PM   #10
Malachi73
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Anybody?
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Unread 11-07-2013, 09:24 PM   #11
xcaliber81
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maybe a bad switch or the actuator itself? would be my guess if the wiring is in good working order, the 96-98 have door lock modules could be any one of those.
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Unread 11-08-2013, 07:39 AM   #12
Kingr98
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Is your battery fully charged?

Do you door locks make any sound when you try to unlock them? Could be seized up actuators. If you can hear a sound like the lock is trying to open, the it will not be a wiring issue.

Have you taken a door panel off to watch it as you hit the switch to physically see if the is any movement?
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Unread 11-10-2013, 06:29 AM   #13
Malachi73
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Quote:
Originally Posted by Kingr98 View Post
Is your battery fully charged?

Do you door locks make any sound when you try to unlock them? Could be seized up actuators. If you can hear a sound like the lock is trying to open, the it will not be a wiring issue.

Have you taken a door panel off to watch it as you hit the switch to physically see if the is any movement?
I have not removed a door panel to look at the actuators. I just figured since they will unlock with the power switch, but not lock, then actuators must be good and it must be some other problem. Do you think the actuators could be bad only for the lock position?

Actually, I recently noticed that the back hatch will indeed make a noise when locking that sounds like it's trying to lock. So, maybe they can freeze up only in one position.

I'll try popping a door panel off this week.

Thank you for the suggestion, I never thought if it.
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Unread 11-10-2013, 06:45 AM   #14
Malachi73
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Also, yes, my battery is fully charged.
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Unread 11-10-2013, 10:42 AM   #15
xcaliber81
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Ive been bealing with the fact that my drivers side door locks do not work and theres a bucket list of things ive replaced so in getting my dad to take a look at it when hes not busy cause its a bed wire or two somewhere.
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