Starting issues. Alarm engaged

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Dec 23, 2014
Good Morning,
Last night my 07 LC would not start, at first I heard clicking but not turning over. After a couple attempt it just makes a low hum type noise. This morning the security light was flashing ans the horn alarm was going off but barely audible. When I started to disconnect the battery the alarm began to sound off at full strength. Tested the voltage across the battery 12.5. I have had issues with the Hazard/Transfer case switch but not within two weeks. I cant hook up the battery without the alarm sounding. Any suggestions? Is low voltage causing this and maybe try new battery. It is an 84 month only 2-3 years old but I did have issue that could have drained the battery with the switch issue.

Thank you.

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