On my grandpas 96 Grand Cherokee when the rear hatch did open if u left it open for more than bout 10 min. And also the rear doors open for more than 10 min. it wiped the battery no power. We have had the battery to oreilly and to napa before they closed doors and they test battery fine what would cause this.
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I have the same problem with mine, push with your left hand against the plastic on the left side of the handle, and with your right hand open the latch, I don't know why it works but it does. At least on mine.
A common problem with this age of cherokees. The latch mechanism has a couple plastic peices in it that can break easily. Did it perhaps freeze and someone pulled on the handle, or pull the handle when it was locked. It doesn't really take too much pressure to break these after they get 8-10 years old, they get brittle. If you can get it open, get the inside panel off and look at the mechanism, you will see one of two part very visibly broken.
if it's still stuck as of today look under the rear bumper in the center,WEAR PROTECTIVE EYEWEAR and with a flashlite high up in there you will see a couple of studs with nuts. using a extension and i believe a 13mm socket loosen but do not remove both nuts. pull on the door a couple of times to free it up and then retighten both nuts. now try the door slowly and it worked for me.you will most likely have too repeat this until it operates freely and closes tightly [to keep the elements out].it is not labor intensive and it's worked on my 96 gc twice. best and luck and let the rest of us know how you came out. jeepinjiminy
This is kind of tricky. OK let's start, you have to crawl into the rear
hatch area from the inside of the car. You'll have to pull the rear
panel off the hatch, a screwdriver between the panel and hatch near the
window will work. There might be 2 screws on the panel you could take
out. The trick is to pull the panel far away enough to stick your arm
down towards the latch and release it by hand. We did this at the
dealer all the time.
You may want to have the wiring harness inspected. A major section under the fuse box(hood on 96 GC 4.0) may become chafed by a close proximity AC gas hose connector. My mechanic said it was slowly chewing at the harness. It caused me fuel pump problems, but your intermittant problem could be similar.
have you tried manually unlocking the hatch to reset the security
system?? My 94 grand cherokee limited did not have a key pad to turn system on/off...i have reset it by turning the key in the rear hatch lock to the left twice...see if this works. - SmokeWrench