my keyless remote locks and unlocks the doors, also it flashes the hazard lights when you push the panic button but the horn does not sound. when i push the lock button twice the car locks on the first click and flashes the lights with the second but no horn once again. Any advice

 

Sounds like the alarm horn (or relay) died. Test it by leaving the window open, setting the alarm with the fob and then reach in the open window, unlock and open the door. If the horn doesn't sound then it's dead. Replace it. The horn is located next to the battery.