Hi All, Thanks for the helps!!! I will go to my carpark to have look and try all the suggestions that you guys posted it. Try to remember what happened yesterday: I try to installed the amplifier for subwoofer. So the power cable is 4 gauge - probably bigger than + terminal ? is that makes the current from the battery running through that one rather than going to the normal cable for ignition ? I will try to disconnect it in a sec. And also the remote power for amplifier, getting it from accessories lamp under the steering wheel. Conditions : - All the alarm and car remote is still active - Headlight(High and Low), tail lights, hazard lights and other lights in dashboard is still on except for the turning lights. The unusual things: - The trip computer for fuel consumption is set back to 0L, average km reset to 0, outside temp E C. - Power windows didnt work. - The transmission cannot be shifted (except pressing the button) - No power to Head Unit. - Engine cannot start I will try the following : - try to remove both negative and positive terminal and put that back on (450hp suggestions). - Check the terminal whether that one dirty or not. - Try to remove the big cable for audio. If this cannot help I will join the NRMA Road Assistant, do I have to wait or can use the service tomorrow ? Guess what, I called toyota Glebe service centre today and they said to "Tow" my car to their service centre. - I live in an apartment that cannot have a vehicle higher than 2m to come in. and it is in 6th level. Really not helpful at all. Other consideration, might call Mobile Auto electrician. Any of you guys have a contact for reliable car electrician guy (the one that will not cause further trouble) ? Thanks so much !!!! Cheers,