Hi, over the last coupe of days my alarm has started to sound off intermittently whilst parked and I am driving it.
Now I am in the situation where the alarm now goes off as soon as I connect the battery and won't stop.
Can anyone help?

what year/model truck have you got bud, that'll help people with any possible answers

L200 Barbarian registered 2007, on a 56 plate.

are you sure it's a barbarian as they didn't start making them till 2010 as far as I'm aware
56 plate would have been either an elegance, diamond, animal, warrior,4life or 4work