For some reason my battery has killed itself and I have gone to jump start the car but as soon as I turn the key the back up siren screams and can't get it to stop and when it does I lock and unlock the car like normal try again and as soon as it goes to turn dash lights on the back up siren screams,
Has anybody had any of these pro lems before it is a Clifford alarm by the way

Get someone to use some jump leads. Lock car up manually with your battery disco'd, hook up jump leads, turn alarm off, open up.

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Sorted it now cheers it works out I had to use the key instead of the fob to lock and unlock as where my battery died it reset the alarm

Cheers