ok, in my case i only had one horn originally and one wire. what would i need to do?

 

You SHOULD be able to run the hot wire to both horns via a splice or jumper. I would also connect the 2nd post of each horn individually to ground (i used the bolt for the horn bracket-to-frame connection. Since you're paralleling 2 horns where you previously had, you might blow the horn fuse. If you do, i'd try the next fuse size higher but no more than that until you know if the wiring can handle it. Also, I'd swap the relay (if the new one is the same fit as the original).

 

So cut the harness off the first. Run each wire from that one to each horn.. Then ground both horns?

 

just attach the stock wire to one of the prongs, then just ground the other prong. i just took a female spade connector put that on a piece of 8 guage wire and put a big holed ring terminal on the other end. i put the ring terminal on the bolt that holds the horn in place.

 

yaya, i know all about that, but what i'm trying to do is hook up a pair of horns to my truck that only had one horn from the factory.