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So my GS300's been sitting in the garage all winter due to the great Minnesota weather. It finally started warming up the last couple days so yesterday I tried to start it up and it was dead from sitting all winter. Well the battery wouldn't take a charge so I ended up getting a new battery swapped out today.
When hooking up with new battery I noticed something I have never witnessed before. After putting on the positive, I connect the negative and the horn comes on full blast and the headlights come on. Its not like the typical security beep that you turn off with your key and everythings cool. The horn goes off in 1 full constant sound like if you were laying on it and when trying to turn it off with the key fob or unlock/locking the door manually it wont turn off.
Before I shut it down for the winter everything was perfect with it so I can't figure out whats going on...any ideas???