changed my battery now i need to know how to reset the security system on 2009 Dodge Grand Caravan

I started my van it was 5 below zero out it ran for 2min and shut off I completly lost power to everything. I changed the battery out and when I connected the cables the horn honked. Now it does nothing and I was told about the security needing reset but I don't know how. Please help. Thanks justin

Asked by for the 2009 Dodge Grand Caravan