1993 subaru impreza headunit

Well today I brought a new Pioneer headunit to replace the old cassette deck in my 1993 Subaru Impreza, I managed to get it all wired up and running.

It goes well, until you turn the volume control past a certin point, at this point the unit shuts off and will not turn back on. I checked the wiring, and it has blown a 2A fuse, (the one thats in line)...I replaced the fuse, cranked up the volume one more, and it just blew again....Ive never wired an audio system before and was pretty pleased that i got to even produce sound, but now im pretty gutted that its got this problem....I am usint the crappy speakers that came with the car in 1993, but am not shure if this is the problem.

Any help greatly appericated.

Thanks KANE

Either you have an a bad speaker, which will shut a deck down, or you have a lousy ground. Did you happen to use a wire harness?

Yer the speakers are really old, but they do produce ok sound to this point when they shut down. I have tried numerous grounds, but neither have been right on the chassis.

It was pretty confusing trying to wire it up, the car only has two front door speakers(and has only ever had two), but wires for four speakers(front and rear) were running into a single plug into the back of the old head unit, so seeing as though it only has fronts i only wired the front wires into the new one.

And when i drive my car with the blown fuse it hardly idles for some reason...very annoying.

The internal amplifier of your Pioneer radio gets it's power from the yellow wire.  It is not uncommon for these units to pull upwards of 6 or 7 amps of current.  

How big is the wire with the inline fuse holder?     And is it a factory installed wire?

Is the wire is the same size or larger than the yellow wire of your radio??   If the wire is smaller than the yellow wire you may have to run a large enough wire to the positive terminal of your battery.

Remember to put a fuse holder with a 10 amp fuse at the battery. 

The yellow  wire with the fuse holder is the same size as all the other wires going into the stereo...

I put a 10 amp fuse in the holder, and it doesnt blow the fuse anymore...But iz it safe to do this? The unit itself only draws a max of 10 amps. I can now turn the volume up till i get static, with the 2A fuse, as soon as it got just a little static it would blow.

And should i be sweet to stick in some 5" door speakers, 2 6x9's, and 2 12" subs with a amp, and crank it loud?