Found out why my radio fuse #21 kept blowing out

[Garageaholic]

So my radio fuse #21 burned out one day out of nowhere while driving. I had no tach and no OBC. I deduced that everytime I plug in my 1 month old pioneer headunit, the fuse blows automatically. Could the headunit itself be faulty or overheat where it grounded itself out in the internals?

The fuse on the radio itself didn't blow out. In fact, I took that fuse out and plugged the radio in. Then once i put that fuse back in, teh fuse box fuse blew. I don't get it.


Stereoinstaller luke, where are you!?!?

[StereoInstaller1]

Wait, what, huh?

Plug your deck in and fuse pops?

Rule #1: Blame the installer. Get your testlight out...something is rong.

Luke

[netcsk]

sounds like one of your hot wires is touching the sleeve around the unit, or the actual unit its self.

Does it only blow the fuse when the radio is turned on or will it happen with the car completely off too? But yeah, just pull it out and look at your wiring to make sure nothing is exposed.