i just got a low horn out of a lexus ls400 and went to hook it up to my truck. well i hooked it up the same way the old one was hooked up and when i want to test if it worked i blew the fuse under the hood so i put another in and blew that one so now i put a 30 in instead of a 20 and it doesnt blow but the the horns wont sound when hooked up to the truck. so idk how exactly the horns are wired or how i could have messed this up so if any1 knows anything or has suggestions thatd b sweet

 

im not sure but try switching the wires but dont get your hopes up just an idea

 

na thats not the problem. it says on the horns which is the 12v and ground so i got it hooked up right sadly

 

Hook the battery positive directly to the horn positive and see if it will sound.

 

yeah the horns sound when i hook em up that way just not when hooked up to the truck

 

You will need to hook up a relay then to make it work.