Hi all, I'm new here and need help! My 2000 MPV is beeping, beep beep pause beep beep pause, with no keys in the ignition, doors locked. The beeping gets more persistant with the keys in the ignition, the battery is now nearly flat and i don't know if the beeping is because the batt is flat or the beeping caused the flat battery. Please HELP ME

 

Does it have an aftermarket alarm system on it? Does it have any other symptom like an interior light not working/check engine light/ignition lock sticky?Sounds like something an aftermarket alarm might do but the van does have a beeper in the CPU.