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Recently I got a 2006 Nissan 350z (Enthusiast trim) with 250,000 miles (mostly highway). The previous owner was quite the stoner, judging by what we found in the various interior compartments during its first detail. After checking around the car, I noticed that the previous owner, let's call him Chad, had installed an aftermarket audio system and subwoofer. Great right? Who doesn't love getting a little extra in their investments? Well, let's just say that Chad was probably high as a kite when he installed this system. The first thing we noticed was that the subwoofer was set to take all frequencies of audio, not just the low ones. In case you didn't know, subwoofers are specifically designed to handle and play the lower sounds in your music. Alright, we said, maybe that was a little dumb but it isn't a huge deal and we can just fix it real quick. Well, as I was finishing up the installation of my first mod (a CAI) we noticed that something looked a little off by the battery. The wiring for the audio system, to be exact. When we took a look at the wires we found a fuse on the negative wire and absolutely nothing on the positive wire. Anyone who has basic electrical knowledge would know just how wrong that is. I was shocked to find out that I had been driving around with such a dangerous fire hazard under my hood. If something had gone wrong with the wiring there would have been absolutely nothing to prevent my car from bursting into flames. I wish I had taken a picture! Of course, we fixed it and all is right now, but man that was something...

2006 Lincoln Zephyr 3.0L v6, FWD Stock radio, no navigation 61000K miles I just bought the car, almost positive it has the factory alternator never been changed. I had put in: 2 CVR-12 Kickers, power acoustik 1800w 2 channel Class A/B amp, no power capacitor as I experienced with my old car that it made the alternator worst. So this time instead of installing it myself I took it to best buy, bought my own wire kit (power acoustic 4GA) even tho the wire kid says 4 gauge, the guy said its too slim, not really a 4ga, he cant put a warranty on it, but he will install it. So I told him to do so. Now today I have noticed a clicking like sound coming from the engine, sounds like maybe one of the pulleys. Don't want to blow the alternator out, or have any snapped belts. Anyone had this problem?? Or how can I tell how many amps ismy alternator?? What kind of alternator do I need? Or is it all fine and I'm over reacting??