My car horn only works some of the time - any ideas?

Question

It works when i start the car, and when i start driving, but when the car is warm, the horn doesn't work. What can this be and how do we fix it? It's a Pontiac Sunfire by the way.

Answer 1

It could be the horn relay switch going bad. Horn relays are like a fuse, pull it out and take that to auto parts store, see if they can match it.

Answer 2

Its either a bad ground or a broke wire in side of the plastic caseing. To fix 1st. check ground even the bolts that attach it to the car. Or run a hot wire from horn button to horn to check the positive connection.

Answer 3

un plug the horn in front see if 12 volts with digital meter while holding down on button// if constant 12 volts// replace horn // if voltage fluctuates replace horn contact spring or horn contact unit both these units a center of steering wheel on top //center of wheel under whrrl nut and steering wheel///need a steering wheel puller to get the wheel off to replace contact spring

Answer 4

i mechanic for a living ,and you might want to check the ground inside the steering wheel,,its the wire that connects to the horn button,also check the relay,,usually its the relay that goes bad,,they actually go bad from not being used much,,good luck hope this help,s,

Answer 5

Check the earth!
Clean the terminals.

Answer 6

You definitely have a bad connection somewhere. You'll have to trouble shoot it in order to figure out where it is.

Answer 7

Unfortunately there is no way to fix this. The car is junk and should be recycled immediately.

Answer 8

go to a macanic

Answer 9

yell mad loud