My dad and I installed a 20 amp air horn to my blazer (in combination with the original horn), not realizing the system was using a 15 amp fuse. ended up blowing the fuse! Any advice for adding the air horn with the original horn (piggybacking if you will)?

 

relay

 

problem is that the relay for the air horn is ground triggered, and we want to use the original horn in combination with the new air horn... the biggest problem is we cant find the ground wire! the repair manuel we have does not show the ground wire for the horn.

basically what my dad is trying to do is have two horns triggerd by one "button." the original horn has its own relay, and the air horn has a seperate relay because the original horn's wiring only withstands 15 amps. how can we make this work?

 

The factory horn uses the bracket as the ground. Swap the ground and switch wire around on the air horn relay, it will work either way.