Hi guys I have a problem, when I open the door the horn starts for about 10 seconds. I can't turn it off, and I can't lock or unlock the doors by using the remote control.
Please can someone help me.

 

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Does the remote work when the horn is not blowing? Have you replaced the battery in the remote?

The horns blowing when you open the door sounds like the alarm is being triggered. Normally you re-lock the doors to turn off the alarm. Have you tried locking the doors?