I can't figure out how to put my pioneer deh 10 in auxiliary mode. I bought one of those audio cables to plug in the red and white jacks in the back, and connect my mp3 player, and I can't figure out how to swap to aux mode.

That's not an auxiliary input, it's an output. Pioneer units that have an auxiliary input use a 3.5mm mini jack, not RCA jacks. Your model does not have an auxiliary input, or any way to add one..

After looking up your unit's info, I found that it does indeed have an aux input, but it's on the rear of the unit. Get yourself a 3.5mm aux cable (normal aux cable), pull the unit from the dash (being careful not to disconnect any wires), plug one end into the aux jack and feed the other end thru the area where the unit sits in the dash and out one side or the other of the center area of the dash (by the footwells). Put the head unit back in place and GENTLY pull the aux cable enough to get out the last bit of slack, but not so hard that you pull it out of the back of the head unit. You can tuck the extra slack up under the console where it meets the carpet. If you wanted to get real fancy, you could drill a slot in the storage area of the console large enough for the cable to fit but small enough that the end won't slip through so you can keep it all out of sight and just plug your phone or MP3 player in and hide it in the console. Then just switch the source on the unit to aux and enjoy!

clean all conects with acohol and cheak for shorts

there should be two aoxzilurey wires on the back you stereo red and white! plug in your male wire to the female on the back of your stereo

That jack is for output not input, that is use for amplfiers,
the auxiliary input for pioneer is on the blue square plug

pioneer interface

no it does not have built in bluetooth but you can get a optional bluetooth kit Pioneer CD-BTB200

you have a stereo rca plug set to a mono audio plug.
you need a stereo rca plug set to a stereo audio plug

hold it for like 30 or so seconds and press back and forth and it should work hope this works

It sounds like you've connected to the front or rear audio RCA output.

Pioneer CD players generally don't have a direct auxiliary input like that - what you'll have to do is get a CD-RB10 adapter(it plugs into the CD changer connector on the back, and your cable would plug into that).

You need to identify the four wires that carry the DVD audio in the factory plug, and re-wire them to RCA plugs that can be used with the Auxiliary input RCA jacks on your Pioneer unit. The four wires should be: Left (+) light green Left (-) white Right (+) red Right (-) black The easiest way is to purchase some inexpensive RCA cables (or better yet, speaker wire with RCA ends). Cut the cables and wire the center pin conductor wires to the (+) audio wires in the stock plugs, and connect the outer shield conductors to the (-) wires. Then connect the RCA plugs to your head unit's auxiliary input jacks.