If it's a factory alarm, unlocking the door with the key will usually disarm the system.
I've had this exact problem before when being jumped off. The fob DOES NOT make it stop. We removed the fuse that goes to the horn. As soon as your battery gets recharged from the alternator, the fob will work again and the alarm will quit sounding. The only pain about removing the fuse is that the cruise control will not work until you put it back.
Ok the wire that goes from horn itself to steering wheel is being grounded. it is completing the circuit find the negative wire on the horn itself and follow it and see if it is rubbing on any metal parts of car causing it to ground. if not then on your steering wheel the button or one of the buttons are stuck or shorted. or could be a stuck horn relay try tapping it lightly. Relays are not always where the fuses are check your manual where the horn relay is.
Oh ok then it is the alarm. Yes you must deactivate it using your keychain remote. after you reconnect a charged battery or a jump would casue it to go off. It should reset itself. If it is aftermarket alarm system i cannot help for there are so many kinds It could lose the program codes when you disconnect battery for extended amounts of time meaning you have to go to an installer so they can reprogram it.I hope this helps. If you still cant get it to shut off i would disconnect the horn connections so you will not get other drivers mad at you haha. and bring it to an audio installer and see what they can do for you. They shouldnt charge you to tell you the problem.
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SOURCE: I came back from vacation my 2000 honda accord
Your car is in theft mode. Try turning the key in the door. This disarms most factory alarms.
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my brother in law jumped the van so i really dont know if it was jumped backwards. But the horn wouldnt stop blowing and couldnt get it to stop. think it has something to do with the alarm.
never had this problem until we jumped it off
did u jump the battery backwards?
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