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Unread 01-14-2015, 07:16 PM   #1
esu
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Easiest Way to disable ZJ?

Guys, let me explain my predicament. My family is estranged from our 27 yr old son. I believe he has a key to my 95 ZJ 4.0. I believe he has used it or will use it when we are at work. Is there any way to simply disable the truck that I can undo and redo easy enough that maybe my wife can do also? Any help appreciated as always, thank you, Cory.

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Unread 01-14-2015, 07:22 PM   #2
paxbnm
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Unread 01-14-2015, 07:22 PM   #3
vlackattack
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I believe there's a relay in the fuse box under the hood for the starter, taking that out will keep it from starting. Probably the easiest method.
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Unread 01-14-2015, 07:46 PM   #4
firsttimeZJ13
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Pull the asd relay and leave it in a location only you and your wife know about. Preferred not somewhere in the Jeep.
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Unread 01-14-2015, 08:02 PM   #5
kensnelling
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If it was me, I'd pull all 4 lock cylinders and take them to a locksmith to be rekeyed. As it is right now, even if you disable it so it won't start or run he can still get inside it (and open the hood too) and do some sabotage himself, if he's so inclined.

Ken
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Unread 01-14-2015, 08:11 PM   #6
xcaliber81
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Quote:
Originally Posted by kensnelling View Post
If it was me, I'd pull all 4 lock cylinders and take them to a locksmith to be rekeyed. As it is right now, even if you disable it so it won't start or run he can still get inside it (and open the hood too) and do some sabotage himself, if he's so inclined.

Ken
Where's the 4th lock cylinder? The thing with pulling a relay is its easy enough to replace. Think about installing a kill switch I once thought to put a kill switch in the window lock but then you would loose the window locks.
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Unread 01-14-2015, 08:19 PM   #7
riot1987
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Originally Posted by xcaliber81 View Post
Where's the 4th lock cylinder? The thing with pulling a relay is its easy enough to replace. Think about installing a kill switch I once thought to put a kill switch in the window lock but then you would loose the window locks.
I wanna do something similar to mine as well
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Unread 01-14-2015, 08:20 PM   #8
dflewelling
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Disconnect the driveshafts lol
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Unread 01-14-2015, 08:22 PM   #9
Cbob4
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It might be best to pull the fuel pump relay. That way, she'll turn over but not start, he'll just think it's a Jeep thing. Pull the starter relay, where the ZJ does nothing when he turns the key, and he'll probably figure out you've done something to keep him from using it...and he'll get pissed. Getting pissed, he very well may take it out on the ZJ...
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Unread 01-14-2015, 08:30 PM   #10
dflewelling
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Remove the serpentine belt...or the engine. Nah but seriously the fuel pump relay would do it...my 95 5.2 will not run or start without the MAP, that would be quick and effective, much more effort on his part to go that route rather than replace a relay...
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Unread 01-14-2015, 08:39 PM   #11
kensnelling
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Originally Posted by xcaliber81 View Post
Where's the 4th lock cylinder?
Both front doors, liftgate, and ignition. You could just do the doors and the liftgate, but then you need to carry 2 keys.

Ken
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Unread 01-14-2015, 08:58 PM   #12
CatSplat
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If you're going to pull relays, pull at least 2 of the fuel/ASD/starter/wiper relays so he can't just swap the wiper relay in for the one you've pulled, since they're all the same relay.
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Unread 01-14-2015, 09:35 PM   #13
Cbob4
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One thing we haven't considered, since the OP hasn't posted back...does this dude have the smarts to figure out how to get around the disabling? I am curious to know whether this dude knows his way around a ZJ...
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Unread 01-14-2015, 10:52 PM   #14
Uniblurb
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^ thought the same thing and are you going to pull all the relays since the kid may just take the horn relay and stick it in where the ASD or fuel pump relay was removed?
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Unread 01-14-2015, 11:06 PM   #15
SchizophrenicMC
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How often is the ZJ used? I assume fairly frequently because your wife needs to be able to disable and reenable the Jeep as well?

If you use it frequently, your best bet is probably going to be removing the Automatic Shut Down (ASD) relay and fuel pump relay. These are both necessary, and there aren't enough of the type of relay they use in other spots, to swap in relays for both, and still be able to start the Jeep.

If you use it fairly infrequently, you could disconnect the crankshaft position sensor. This is a real pain to get at, and without it, the Jeep will crank and crank and crank, but never start, no matter what relays are left in the box. It's not easily visible from under the hood, or under the vehicle, and if you don't know what to look for, you probably won't see it behind everything ahead of it. Of course, if you need to reconnect it quickly, you'll need a lot of practice reaching down into the right spot.
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