When i blow the horn in my 2004 chevrolet impala it sounds really low u can barely hear it

sounds like the diaphragm in the horn is worn/dried out. check to see if you have battery voltage to the horn with either a test light or voltmeter and the horn has a good ground as if not then the horn won`t operate correctly. if these are good replace horn.

Check the horn fuse!

Check the circuit breaker/fuse first.

Probably the horn itself. You can jumper the horn relay and make it sound to find out.

horns are only a magnetic coil actuated by a set of points that make and break a circuit at a rapid speed there by vibrating a tin disc that produces the noise we hear. If it continually blows the fuse then the coil is shorting out (probably rusted) and the answer is to buy a new horn.

My horn is low when I press on it it makes a little toot noise would I need to replace the horn I'm thinking it's a fuse or relay it makes a low pitch sound where you can barely hear it thanks in advance

first check the fuses if they are good check for power at the hrn while someone pushes on it the wheel, if you have power replace the horn if no power you have to follow the wiring until you find a break

Yes they do. Have someone honk the horn to see whitch one.

make sure the horn is making a good ground on the frame

THE HORN IS UP FRONT NEAR THE RADIATOR, HAVE SOME ONE TAP IT WHILE YOU LOOK, IT MAY BE UNDERNEATH OR DOWN LOW.