How To Change The Alarm Battery. They will put your alarm system on a test mode meaning they wont act on any alarms that the battery replacement may send to them. Place the system on test mode.

Open the hood and loosen the retaining nut on the cable clamp with a socket wrench. Step 2 Contact the monitoring control room to let them know you are going to change the backup battery. The alarm will then sound.
Connect the RED wire to the RED terminal of the new battery by pushing the connector firmly onto the terminal.
Youll need to reconnect the battery and repeat Steps 1 and 2 to disable the alarm system. The alarm will then sound. If its less than 5 years old or if theres no date written on it continue with testing. If your alarm is hardwired turn off power.
