Is there a diagram for the JBL stereo wiring in the 2004 4Runner?

On the Land Rover Discovery with the back of the timed climate remote control facing upwards, use a coin, or a similar implement, to rotate the battery cover. Lift the cover off to reveal the battery compartment.But what does a car battery actually do Well Your car battery provides the zap of electricity needed to put electrical components to work. It also converts chemical energy into the electrical energy that powers Your car and delivers voltage to its starter. And it stabilizes the voltage (a.k.a. Energy supply) that keeps Your engine running. Important, indeed. Once You replace Your vehicles battery, its lifespan depends on how long it can hold its charge as well as how long its capable of being recharged.