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Warning light keeps flashing after locked, and fuse #5

12091 Views 9 Replies 4 Participants Last post by  W208 Hawkwind

Sometimes, after locking the car with pressing Lock on the key fob, the orange lights flash three times (as it should), then keeps flashing very fast, and the interior lights stay on, as if the alarm just set off and no siren sound.

I found that, if I pull the fuse #5 in the fuse box that's located in the back of the trunk, it will disable it from happening. However, the red light on the truck button inside the car stays on, and no flashing three times at all when locking. It just locks the car.

I did a few research, it seems the problem is the battery inside the siren need replacing. Where is it located on a Right-Hand-Drive (UK/Japan specs) car? Do I need to replace the whole siren or I can just replace the battery?

Also, if I leave fuse #5 pulled, will it drain the car battery with the red light stays on all the time? And any other side effects?

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So the flashing lights, interior light on tells us that the alarm siren battery is low? The siren still sounds when we push panic? Also, my alarm indicator light(tow alarm) flashes quickly(vs. normal armed blink) but does not stay on as you report. Did simply unplugging the siren work, stop all the symptoms you described after locking the doors? Because I found my car will flash lights for 3-4minutes and then go off but randomly start flashing again so as to drain my battery if left locked, please advise.
Was your siren dead before you replaced it or would it still make sound when tripped or panic button pressed? Did you have the blinking tow alarm light, not normal flash but fast flashing?
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