Thanks speedster_101,
Do you know how much ampere are recommended for this relay? Actually I had installed new horn, (pow pow) which were some times not working due to unknown reason, only tick tick sound i heard when pressing horn button. Electrician replaces horn relay with right air conditioner relay. Now horn is working good, but I dont know about AC. Relay is shown in fig, has rust on it and its amp rating is not read able.