I would like to invite you to join our Mazda Pickup Club on FACEBOOK, please PM Ron (azzkkr2600) for details.
1) Most of the time when the vehicle does not track properly (kumakabig) there is a problem with the alignment.
Have a competent shop check your alignment out completely.
I recommend Wheeler's along Dapitan St., very near Banawe St., on the Orthopedic Hospital side.
2) Have your aircon checked at a competent shop - I recommend Ding Clemente's along Benitez St., Barangay West Triangle, Quezon City.
Its very near Examiner St., and in the same area as the house of Prez Noynoy along Times.
Tel No is 924 04 62, look for Ding Clemente or his foreman, Tsong - tell them I sent you.
3) Most of the time when a horn is not working correctly it's a wiring issue, Ding and Tsong can help you there. You may have to have the whole horn wiring replaced.
Hope this helps,