Ticking/buzzing sound 13 TE

[Snowdogyyz]

Twice in the last two weeks, I've gone out to my garage and heard a ticking or buzzing type sound from the driver side rear of my trail edition. No keys in the truck. I cranked the truck both times and it stopped. Worried it may drain the battery. Any idea what it could be? Thanks!

 

[hearno]

Before you get dominated for not searching...

http://www.toyota-4runner.org/5th-gen-t4rs/63923-noise-comming-rear-my-4runner-limited.html

 

[Snowdogyyz]

Got it. Thanks for the link!

 

[Antman]

Your trucks just ticking away the moments that make up a dull day...