I have a 2001 jeep cherokee. Since I got the jeep the front passenger lock would sometimes not lock and I would have to lock it manually. All the other locks would work when I locked it. Sometimes it locks, sometimes it gets stuck or doesn't lock all the way. Recently at times when I would lock the jeep (hearing the horn when I lock it) all the locks wouldn't move. The next day it would be perfectly normal. It's hit or miss. Also the rear hatch doesn't lock at all when I lock/unlock the car at all. Can someone help me please its getting really annoying having to check each lock before I leave the jeep!

 

anyone?

 

Mine just works when it wants to but I don't lock my doors. Possibly a short or bad connection?

 

Possibly the master window switch.. But since you said the horn beeps etc., it's also possible theres a bad relay, or that there's a short somewhere...? Idk...

 

I think the horn symptom is only when he uses the key fob to lock it, because the horn wires shouldn't be anywhere near the power lock wires

 

Good call!

 

Lol just trying to help u understand haha

 

This is what I did last week. I started having an intermittent issue where when I tred to lock it from the door switch or fob, it would just make a click noise on the passenger side. I took out the passenger side door module, took it apart to get to the circuit board. I immediately noticed that the solder connections on some were cracked. Very slight and almost unnoticeable to the untrained eye. Take a soldering iron and a desoldering tool. Heat up the broken connection and suck up the old solder. Resolder the connection with standard 60/40 rosin core. You can get away with just heating up each point and rejoining the two cracked joints which is what I did, but I did notice that some of them would not seat to the board so I just used new solder. Seems when they assembled them in Mexico, them beaners used **** poor solder with **** rosin or no rosin at all.

 

could there possibly be relay thats bad? its hit or miss its weird. It must must a central control problem with the locks. But I dont know where thats located

 

I don't know how the jeep guys do it (no power options here), but I have had the solenoid/actuators/vac-pots go out on other cars I have worked on. It might work when you bench test it, but it doesn't have the oompf to push the locking mechanism anymore