Why does a horn stop working in a car?

Question

All of a sudden our horn stopped working in our 2003 Monte Carlo. Is there any specific reason why a horn stops working? What's going on here? Is there a way to fix it?

Answer 1

Well first we need to understand the horn circuit a ground from the horn button activates a relay to power the horn. So it can be the ground at the button on the steering wheel or the relay from there check the wire to the horn. Easiest way get the chiltor check the schematic and apply a ground to the horn relay simulates pressing the horn button if horn sounds the problem is in the steering column if no sound pull the relay and apply power to the terminal going to the horn if it sounds it's the relay if not check the wiring. you should also be able to hear the relay click when the horn button is pressed. hope that helps.

Answer 2

Some possible causes are:

blown fuse
broken wire
bad relay
faulty horn switch
bad horn

Answer 3

1. horns don't last forever. rusty, rainwater, etc; yours is14 years old. 2. horns have relays. in addition to a fuse. So look for the horn RELAY, a small plastic box thing, maybe one inch cubic. 3. ground wire, or horn body to car body ground is rusty and corroded. look at the horn directly;

Answer 4

Check the horn fuse

Answer 5

All this mombo-jombo.

It's a blown fuse. I bet the cigarette lighter doesn't work either. Maybe the interior dome light too?

$0.02 fix.

Answer 6

Most likely a blown fuse.