This was happening to my car when I first got it. The previous owner thought it was the the security system. Everything started working when I repaired the DME (engine control computer) harness. It was badly melted. I could only tell by tearing into the relay pod cluster and then into that side of the harness where everything was melted. Additionally, this fixed many problems like: in dash computer, gauges function, flashers, fuel pump, acceleration, and multiple fuse poping.