I was wondering how do I wire an alarm horn to a button? The horn has a positive and a negative wire, so I'm guessing that the red goes to the + on the battery and the black is grounded somewhere that has metal.

 

depends how you want to set it up. you can do red wire on horn to +12v on battery. ground wire for horn onto 1 side of the button and the other wire on the buttom to ground. or vise versa if you want to make the button + line to the horn and make the horn normally grounded.

 

Which do you suggest that's best and easiest? Sorry I'm a total n00b at electronics. Basically, I want a button in my car that's hooked up to the alarm horn, and when I press the button I want the horn to sound. Thanks.

 

I just re-read and it would work like this?:
Red from horn to battery, black from horn to button, than ground the other wire from the button?