I replaced my battery in my 2006 nissan altima, car started right up, however the alarm set off and when the car started the battery light stayed on and also the brake light. There is no throttle either when I step on the gas. Help

I would suggest a plugged fuel filter or bad fuel pump. Maybe bad or stuck Mass Air Flow Sensor.

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.

The alarm will sound if the alarm was set before you dropped the key fob. Just put the key in the ignition and start the car, the alarm should turn off.

you need to replace the alternator, that will take care of the battery light, and dyeing when removing the cable... replace that and we will go from there on your brake light issue.
hope this helps

hook it up and wait a min or 2 for it to stop or disarm the alarm after but i think it will stop after 1 or 2 mins

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 :)

take interior cover behind tail light inside trunk off.the bulb the bulb twist locks in hole(twist counter clockwise to remove)repeat procedure to replace.

weak battery and check that the altanator is working

when both lights stay on with the car running it usually indicates an alternator that is not charging at an acceptable voltage level. check the battery voltage with the car running, if it is under 13.5V you should replace your alternator.

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.