Fuse problem
 

Since we don't have a Bluetooth option stock, I thought I would try one of the gizmos plugging into the cigar lighter.
I find that every time I plug in, it blows the fuse.
So I disassembled the panel and got the socket out. I checked for continuity and found the unit was good, no short across the contacts.
I replaced everything and checked again and it seemed ok, leaving it powered up for a minute.
The next time I started the car, it was blown again. Additionally, the window switches quit and that fuse proved to be out too.
My question is if it is likely to be the control module under the seat that has gotten wet? I haven't noticed any leaks before and it didn't seem the carpet was wet.
Thoughts?

A fuse blows when the circuit is drawing more amperage then the circuit (wiring) is designed for.
So you most likely have a short to ground or your gizmo is drawing more amps then the circuit is designed for.

If you only blow a fuse when the bluetooth adapter is plugged in, I think you found your culprit.

You could also measure resistance from the fuse slot to the cigarette socket, but generally if it isn't shorting to ground when not plugged in I would not suspect that wiring to be the cause.

maxbottomtime, that is what I have determined.
I have two of those and they both do it.
I have another USB converter which seems to work fine.