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How do you shut off a jammed horn on 2000 Isuzu?

Turning the Ignition ON or OFF

1. Disconnect the battery.

2. Locate the horn relay behind the glove compartment.

3. Remove the relay by pulling it straight out of its socket.

4. Reconnect the battery.

Prying the Contacts Apart

1. Disconnect the battery.

2. Locate the horn relay behind the glove compartment.

3. Remove the relay by pulling it straight out of its socket.

4. Insert a small flat-head screwdriver into the metal slot at the side of the relay.

5. Pry the relay housing apart by forcing the tip of the screwdriver between the two halves of the casing.

6. Reconnect the battery.