[samfarag]

My 1998 Nissan Pathfinder won't start after I replaced the battery. The old battery went dead after leaving the lights on. I tried to jump start it and when I attached the jumper cables the anti-theft system made the horn and light flash. I could hear a clicking sound coming from the fuse box on the left side of the engine compartment. This clicking sound would continue even when I didn't try to jump start. It eventually stopped when the battery was drained all the way. I put in a new battery but the engine still does not start. When I turn the ignition switch all I hear is one click coming from the battery area. Head lights turn on as well as the dash lights but there is no power to the power windows or door locks. The key-less entry switch does not work either the 100 amp fuse that controls the amps coming from the battery is good. Any thoughts?

[TxGreaseMonkey]

Test all underhood and underdash fuses with a test light or multimeter. It wouldn't surprise me if the immobilizer system is preventing it from starting.