My 00' daily driven's check engine light came on and we disconnected the negative battery terminal, and the aftermarket alarm system started going off everytime the car would start. Then disconnected the alarm since it wouldn't start and now the jeep won't start at all. We just put a new battery in it and the alarm is connected again. The tail and head lights flash, the odometer is flashing, and a clicking noise. It all happens for about 15 seconds