mckrob85

Hey all

Finally had enough with neighbours calling police out on me at 3am about my ZJ 1996 alarm randomly deciding to trigger. I've tried all number of wire chopping and grounding ideas, but I'm so fed up that for the sake of my neighbours and ever growing police file, I'm simply going to chop the alarm horns off, that way I can take longer to solve the issue without having to unhook the battery system everytime I park up.

Where are the horns located? Its a stock alarm, 4L engine, 96 grand LTD.

Regards

2Evil4U

There should be a fuse for the horns. I'd expect them to be low in the front of the engine bay or potentially up under the front bumper.

dave1123

The horns are located behind the passenger's side headlight, behind the fender liner. My horns don't work and I think the previous owner had the same problem. I haven't scoped it out yet. I want to eliminate the security system also, so when you figure it out, let me know what you did! For security on my Chevy truck, I installed a cut-off switch in the fuel pump circuit and tucked it up under the dash.

Works well.

There is a relay for the horns in the PDC under the hood.

mckrob85

Thanks for the help, will kill the noise, as phase 1, just so i can keep my home! Will certainly be better than disconnecting my battery all the time!

mckrob85

Been digging around under the bonnet, behind the passenger headlight, but no sign of an alarm horn, is it under the battery?

Regards

mckrob85

Will removing the horn relay in the PDC kill the alarm siren then? Or will it realise and immobilise vehicle?

ol"blue

The alarm is activated by the dome lights. I had the same issue with my '97 ZJ. I went around with the doors closed and gave each one a pull/shake with the door handle until I found that the drivers door would activate the dome light without opening the door. I adjusted the striker in the door jamb to tighten it up a little, then retested it. No more problems, and the alarm was still fully functional. It never come on again by itself even in the biggest wind storms.

mckrob85

Thanks for that, i will drive it tomorrow up to a quiet workspace i have and leave the battery connected, try all the doors and see what happens.

I do remember walking away from the jeep once and noticing that after the dome lights turning off, one rear light (the ones you push in) was on, but wouldnt turn off by pushing it.

Ideally i also want to find out where the alarms horn is (looking at a wire-diagram i see there are 2) so if worst comes to worst i can disconnect them. Also if the horn relay in the PDC will do this. Again, if no one knows then i will experiment tomorrow.

One interesting thing to point out, was that after the alarm sounding, i went out and left the drivers door unlocked, and 20 mins later, and with the door still unlocked, the alarm sounded... hence now why i have had the battery disconnected for a week!

dave1123

Good thinkin' Blue!!

I don't know for sure because I haven't checked yet, but I think you have to remove the fender liner to access the horns.

ol"blue

To access the horns on '98 and earlier ZJ's remove the lower air deflector from below the radiator, according to the manual.

As far as unhooking the relays:
My '97's Owner's manual shows the following control the horn. Under the hood in the Power Distribution Center, In the rear section of small relays/fuses-Cavity 16 labeled "Horn Relay" is a 20 Amp yellow that feeds the horn relay. It is the third from the front, right side, of the two rows in the rear.
In the front section of larger relays- Cavity L is the Horn Relay, it's the fourth from the front, closest to passenger side fender.
Removing the horn relay will indeed silence the horns.
Hope that helps.
Dan

mckrob85

Great! Will get straight on this, thanks for helping out

mckrob85

Right, removed the relay for the horns, and disconnected both horns found next to the radiator... reconnected the battery and siren sounds immediately!

Its a siren, not a horn, so now the horns are silenced, clearly i have a siren somewhere, at this point all i can ask is does anyone else have this? I'm assuming its the same siren that 'chirps' as you activate/deactivate the alarm, or have i got a different (perhaps UK) set up?

If so, anyone know where the damn siren is? Tried to trace it whilst it was going off but it simply deffens my ears, to the point it sounds multi-directional and i cant trace it

All i need to do is kill the siren! All replies appreciated!

ol"blue

Unless that's UK only it's an added on theft deterrent system, and not a factory installed one. Every factory system I've seen use the factory horns and flashing lights.
That siren is hidden to prevent a thief from disabling it. They're usually tucked in around the master cylinder over here.