Fusion car stereo output protection?

peja, Sep 9, 9:02am
The front door speaker in my car stopped working yesterday, it turned out that the terminals mounted on the back of the speaker had disintegrated with age. Replaced the speaker today - but still no sound from that channel, although if I run the stereo with the fader and balance set full right and front so all the other speakers are off I can hear a very faint sound and some hiss. I would have thought that if there had been a short that the output protection would have kicked in or at least caused the fuse to blow.

If I have to replace the unit will do so, pity to write it off as it is a good stereo, although it only cost around $200.