Hi, i bought my 93z back in 2000, it came with aftermarket Clifford car alarm. It was working great until now, if I disconnect the battery and hook it up again the alarm works fine, locks/unlocks doors and alarm beeps when it does it.. But as soon as i turn the key to on position the alarm stops working and alarm bulb in the car stays on. I can still lock and unlock the car with the same buttons on the fob key but the alarm does not turn on or off. I have not done any work to the car in years. Any idea what could it be? Thanks guys.