98 altima alarm goes off by itself and wont stop. how do i diconnect the alarm/ where is the fuse located

If it aftermarket(bunch of wires and modules under the dash on the drivers side) remove it. If it is still factory it takes a scanner.

supply power to fuses or relays cut off by your alarm

holdboth the lock and unlosk buttons on your remote simultaneously for about five seconds until the lights flash and horn chirps.that should do it.if not i believe these models used a separate horn for security system.possibly fuse for this horn is bad or the horn itself is bad.to see if this horn works lower drivers window.stand outside vehicle and lock doors with remote.wait about a minute and reach in window and MANUALLY unlock and open door(do not use power door lock button)this should cause the system to activate...horn should beep and headlamps should flash.if horn beeps try my first suggestion.if it doesnt beep and just the head lamps flash check fuses and horn for security system.

Leave the drivers door open and then connect the battery. This has worked for me.

I have a 2000 Altima GXE. My alarm goes off intermittently and sometimes will not stop until battery lead is pulled. Have removed fuse and relay. Please help :)

A 98 Isuzu rodeo alternative alternative little key does that work the alarm system

sounds like a bad install. disconnect fuse to radio amp or remove power from amp as to not drain the battery. have a pro check out your security sys. better safe than smoke!

pull the fuse/ power supply on the main alarm module. it should startt. hook it back up and it should re set.

I've had this exact problem before when being jumped off. The fob DOES NOT make it stop. We removed the fuse that goes to the horn. As soon as your battery gets recharged from the alternator, the fob will work again and the alarm will quit sounding. The only pain about removing the fuse is that the cruise control will not work until you put it back.

You need to first look under the drivers side dash area near the hood release/fuse panel area and see if there is a valet switch. The switch will look like a little toggle or a push switch. After you locate it, turn the ignition switch to the on position(dont start it) and flick the valet to the opposite position it is in now. If done correctly in most cases the red system light will stay a constant instead of off or blinking indicating you are in valet mode. Next try to start the engine. If this doesnt work you need to remove the alarm system and repair the ignition switch wiring or replace the electrical portion of the ignition switch. The aftermarket alarm cuts into the ignition switch wires and bypasses the start circuit through the alarm module. When disarmed the alarm completes the circuit and allows the car to start. Good luck hope this helps and please rate this.