Clicking?

I'm getting a clicking or ticking kind of noise coming from the rear of the cabin while driving or stationary. Really wondering if it's the fuel pump. Anyone ever had this before? I had the exact same noise in an 03 GMC Sierra from an a/c actuator behind the dash.

Never mind. Mystery solved. Somehow my rear wiper switch had accidentally got turned on. That thing hasn't worked in years but I guess the motor was trying to do its thing.