Technical Newbies with 'Alaming' Fiat Ducato motorhome !

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Technical Newbies with 'Alaming' Fiat Ducato motorhome !

Brooky Brookland

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Aug 26, 2025
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Hi everyone!

We are two experienced pensioner motorhomers but re-enter the forum cap in hand as have not experienced this problem before.

We are booked on a ferry Thursday evening we would really like to solve this alarming for everyone's sake!

Our alarm went off when my wife (patient Angelina) entered the unlocked habitation door of motorhome.

Brooky (me) confidently presumed it was a motion issue that could be solved by wife exiting and me locking and unlocking cabin doors first with key fob then manually.

Result, alarm went off again. When attempting to start with main key: engine turned over but immobiliser refused to let it. Tried turning same key manually in cabin door again then trying ignition and same result. Alarm going off for about 20 seconds. Off for longer, perhaps a minute, then on again.

Partially solved problem by using the simpler spare key. (Keeping the main key away from the van) This time alarm rang again when turned ignition but engine started. Then the alarm went off after 20 secs and didn't come on again. Until I opened the cabin door when it rang again. Closed door. Alarm stayed off after 20 secs.

Therefore, for you kind people who have got this far; we now have a well maintained van in perfect working order that if you enter and exit through the habitation door doesn't respond to motion and will start normally. But the alarm still goes off when I turn the ignition or open the cabin door.

If it was just me (and my very good family run motorhome garage where it is parked outside this morning can't get any better result and don't know how to demobilise the alarm either), I would be tempted to drive it like is, just being careful to park it away from others so the one off 20second alarm wouldn't annoy anyone. But my more sensible wife reminds me this is not an ideal solution for 3 weeks in France!

Finally, she's had a difficult year and was so looking forward to the break (which we can't delay, just cancel) I really don't want to disappoint her.

Please help!

Brooky and Angelina xx
 
Assuming that you have an aftermarket alarm, I think that for someone to assist with this they would need to know the make and model of the alarm fitted.

One solution would be to just disconnect the alarm siren but that means not having any alarm at all.
 
Assuming that you have an aftermarket alarm, I think that for someone to assist with this they would need to know the make and model of the alarm fitted.

One solution would be to just disconnect the alarm siren but that means not having any alarm at all.
And perhaps some detail of the base vehicle. Is the reference to the immobiliser mean the key code system, or an aftermarket alarm system with an immobiliser function? Given the abscence of detailed information, and the posting of two threads on the same subject, which only serves to diversify effort, I doubt that the required time scale will be met. Some of us also have our own problems.
 
Ah ....key fob.... aftermarket alarm?
Year of van and full details would help.
Pictures of keys? Fob?
 
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