Hi Guys, my friend's 2001 toyota RAV 4 battery went totaly flat and was taken to an electrician, he changed the battery but the car won't start, it cranks very as normal but no start, the horn blows quit strongly and the Battery is a new one (BOSCH) not rebuit, and the security light blinks. The thing is that the car started well before the battery went flat, so I am very sure it is not the starter or the ignition swith, that security indicator was not blinking before the battery change. So what do I do guys.