Why would a car alarm go off randomly to the point where the 'BEEP' sound is no longer heard and only the hazard warning lights are seen? The car is an Alfa Romeo 146L first registered November 1996, 'P ' registration, 1600cc 8v Boxer engine.
we found hanging things on the window such as shades fall off and trigger the alarm, also i guess if you have something hanging (furry dice or air freshener) and the wind rocks the car a little making them move can trigger the internal motion sensors.
A hundred possible reasons! However, assuming that your car battery is charged and its terminals secure, it sounds like an alarm failure as there is "hazard flashing" without the noise. Do you know what brand and model of alarm you have? (if you are unsure/don't have the paperwork, check your remote control and siren (under the bonnet) for information.
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