Need Help With Hookup!!
You can't just splice into existing wire to power an amp. The reason is that the stock wiring is not thick enough to handle an aftermarket amp. Power wire is usually 8awg or more depending on the power of the amp. Ground is the same gauge as the power wire.
You may have known this already but it wasn't mentioned so I'm just covering bases.
Buy yourself an amp kit and a hi/lo level converter and you'll be good to go on your install. Also a battery terminal adapter make things easier to. This is a replacement terminal that has an extra bolt on the end to attach your power cable that runs to your amp. Makes for a cleaner install and easier on you.
I have all of these things if you need them. I would need to know what amp you have to get an idea of which amp kit you'd need though. You can also purchase these items at places like Walmart but expect to pay more money. The last amp install kit I put together was about $50.00 for everything needed (ALL of the above listed) including extra 12awg speaker wire and shipping. It was a nice 8awg amp kit with twisted double sheilded RCA's and true 8awg wire.
Hope this helps some!! Good luck!

