Topic: ZJ Non Start - Alarm (Read 14659 times)

tedthefed · « **Reply #25 on:** October 13, 2014, 07:56:45 PM »

Can you send me the info so I can try it on the XJ I have floating around .

JamesH · « **Reply #26 on:** October 13, 2014, 08:14:17 PM »

Good work Jay

jay140285 · « **Reply #27 on:** October 13, 2014, 08:20:59 PM »

Will do Ted, will try and do my write up in a moment

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Graham · « **Reply #28 on:** January 02, 2018, 05:37:16 PM »

Hi Jay,

did you do a write up on the removal of the may & scofield alarm? I have a 96 ZJ 4.0. All of the write ups I have found so far rely on defeating the m&s unit with a DEI455T bypass module (which I do have) just in case.

If I could remove the m&s unit all together, that would be great.

Thanks in anticipation.

Graham.

bigjeepzj · « **Reply #29 on:** January 02, 2018, 08:16:27 PM »

Hi
Basically you unplug the m&S box and jumper cables and plug the original loom into the Chrysler box. both box's are behind the light switch.
Then trace where the there wires from the jumper cable go and spice the original loom back together.
the DEI455T is normally for bypassing the chrsler box.
Hope that helps

Graham · « **Reply #30 on:** January 02, 2018, 10:57:07 PM »

Thanks for the reply. Yes, that helps.

I have found the m&s unit with several plugs going into it so will work through it and see what happens.

This sounds so much simpler than all the write ups on the US forums piggybacking the 455 module off the m&s unit.

Mike Pavelin · « **Reply #31 on:** January 03, 2018, 10:09:41 AM »

Ignore anything you find on US forums. The M+S module is UK specific, retro fitted at the docks in Sheerness.

bgbazz · « **Reply #32 on:** January 03, 2018, 11:00:21 AM »

Top result.

bigjeepzj · « **Reply #33 on:** January 03, 2018, 01:08:56 PM »

Yep the M&S unit is the crap shit box that jeep UK decided to inflict on the UK. It immobilises the jeep by draining you battery within a week

jay140285 · « **Reply #34 on:** January 07, 2018, 09:15:26 AM »

Somewhere on here there should be pics etc of that I did.

I’ll try and look later

Graham · « **Reply #35 on:** January 07, 2018, 02:32:47 PM »

Ok, gently removing the m&s loom and it’s also tied directly into the back of the plug on the steering column. Any ideas?

Graham · « **Reply #36 on:** January 07, 2018, 03:18:29 PM »

Looks like the loom also extends into drivers door, piggybacking the lock loom.

Graham · « **Reply #37 on:** January 07, 2018, 03:29:44 PM »

Ok, found where it ties into the original loom behind the passenger glove box.

Graham · « **Reply #38 on:** January 07, 2018, 04:11:33 PM »

Ok, possibly the happiest man alive.

ITS ALIVE

Dashboard in bits and wires everywhere but it runs.

Immobiliser appears to arm after 30 second s or so and then it only runs for a couple of seconds but hit the unlock on the fob, the immobiliser light goes out and she runs.

bigjeepzj · « **Reply #39 on:** January 07, 2018, 06:36:36 PM »

thats great new glad to help

JamesH · « **Reply #40 on:** January 07, 2018, 10:56:10 PM »

Good work

bgbazz · « **Reply #41 on:** January 07, 2018, 11:03:55 PM »

Can't help but admire your patience with this problem...others may well have given up when faced with the coloured spaghetti, but you didn't! Well done

The help is what makes this a great forum.

jay140285 · « **Reply #42 on:** January 09, 2018, 07:43:31 PM »

Well done, that’s how mine was with the 30seconds.

Graham · « **Reply #43 on:** February 13, 2018, 10:44:49 AM »

One hopefully last question on this.

So, Jeep unlocks with the fob. One press for drivers door and two for all doors.....but the factory jeep immobiliser only disarms if I hit the unlock button again on the fob with a door open.

I had noticed that the interior lights are not coming on when the jeep is unlocked (before you open the door). I’m assuming they should. They go off when the jeep is locked on the fob.

Graham · « **Reply #44 on:** February 13, 2018, 12:23:05 PM »

So, common sense kicking in here. Reading the manual, the interior lights should come on when the ZJ is remotely unlocked, before a door is opened. I’m guessing that the immobiliser needs to see a voltage drop at the same time as receiving the signal from the fob.

So....why are my interior lights not coming on until I open a door?

Mike Pavelin · « **Reply #45 on:** February 13, 2018, 02:16:14 PM »

if you've removed the May and Schofield unit, it shouldn't have an immobiliser anymore unless someone has installed something else.

Graham · « **Reply #46 on:** February 13, 2018, 02:53:51 PM »

Hi Mike. It’s still got what appears to be a factory immobiliser. Little plastic unit on the dash which flashes when armed. Unless it’s disarmed, the Jeep will only run for a couple of seconds. The May & Scofield unit is on the shelf in the garage.

Is there more I should have taken out?

Graham · « **Reply #47 on:** February 13, 2018, 03:09:40 PM »

This is the light.

Graham · « **Reply #48 on:** February 13, 2018, 03:25:53 PM »

Ok. Getting my head around this a bit more. So if I switch the interior lights on manually and then lock the Jeep, and then unlock it, the immobiliser turns off correctly with the fob first time.

It appears to want to see the interior lights come on as part of the sequence to disarm the immobiliser. So the question is why are my interior lights not coming on on remote unlock....

bigjeepzj · « **Reply #49 on:** February 13, 2018, 05:09:40 PM »

had a similar problem it was the light switch module had a fault

Author Topic: ZJ Non Start - Alarm (Read 14659 times)

jay140285

Mike Pavelin

jay140285

jay140285

Mike Pavelin