Car alarmed this evening!! - Alfa Romeo Forum
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Car alarmed this evening!!

Hi Guys,

I'm wondering if anyone has any suggestions for what happened to my car this evening when I went to go to the shop.

I pressed the unlock button on the fob, the car gave a click as though it was going to open and then the alarm went off. Neither of my key fobs would open the door, after a short time the alarm would stop for a few seconds and then sound again. Eventually I remembered the car could be opened with the hidden key so did that. All internal lights were dead and even when I inserted the fob into the slot no lights or messages on the display came on. I disconnected the negative battery terminal but the alarm kept sounding. After a while the alarm stopped, I went to check the battery voltage and the positive terminal just lifted straight off the battery. Anyway the voltage was dead on or slightly just over 12V. Definitely no where near as high as 13V as you would expect from a fully charged battery. Anyway I left it as was for a 2nd and then reconnected everything. All my settings have been reset in the car but everything is now working as it should.

I'm assuming this must be from the loose battery terminal (even though the clamp is tightened as far as it will go it's not tight enough). I'll fix this temporarily with a bit of foil for packing but does anyone know if this could be a sign of alarm or ECU failure further down the line or is it most likely to be the loose terminal?


quinnj3 is offline  
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The Alarm has its own internal battery which is why it was still sounding even though the main battery was disconnected at the positive terminal.
Bazinga is offline  
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It's possible the car thought someone was trying to tamper with it electronically, I know some house alarms sound when there are abnormal changes to the voltage, opening the doors electronically may have changed it like that
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