2000 eclipse gs no horn on alarm and locking

your also suppose to hit door lock 2x before start and if alarm still goes off problem with fob or your aftermarket alarm programming

when you lock the doors it automatically arms itself. you can disarm by inserting the key in the driver's side door and unlock the door lock, it should disarm if the alarm goes off.

Take off the inside door panel and see if there is something by the lock that activates/deactivates the alarm when you turn the key. Compare the drivers side(L), to the passenger side(R), that works. All mechanical things like to break down over time.

Sounds like you have a short where you are moving the wiring. Remove tape/wire loom from the harness and see if you find bare or broken wires. They are very prone to do this in the wiring between the door and the body. Repair problem wires and you should be okay. Alarm is most likely being triggered by the same short. Happy hunting!

If you can try resetting your remote, and change the batteries if you can't reset it ask a dealership how to

What your hearing is the factory alarm not the horn. Connect the battery when the alarm sounds go to the drivers door lock with the key and lock and unlock the door until the alarm goes off . Then reinstall the fuse for the horn.,

Have you tried starting car,some times on boxters low battery can give this problem
Open with key if alarm goes off insert key in ignition

Just hold the lock and unlock button on your key until you hear the horn again. Then its activated :)

Problem solved by ensuring there are no metallic objects around the cup holders. My wife had left a key and some coins there and these were interfering with the sensores situated beneath the cup holders. Bizarre but true.

it was equiped with silent alarm for that year