94 frontier, cant get cd player to work. all the wires are right, but there is two more plugs that idk what they are for.

Make sure you have a good earth, no earth, no go. Just about any point on the metal car body or chassis will be good. Next use a circuit tester(it is just like a screw driver with a bulb and and wire running through it, it lights up if you have a powered circuit. They are cheap and simple a great test tool, cheaper than a multimeter.). Turn your ignition key to Acc., earth tool, probe wire, if light in tool lights, your wire is good for power tied to ignition. You can always run your power direct to the battery, but for a couple of reasons this is not advisable.

Lastly, check that speakers are wired correctly, your speakers have a + and - points that match the same speaker wires coming from the player.

The extra wires can be possibly for auto aerial, lights or whatever, if the player works without them, don't sweat it, just tape them up so they can't short out.