Hey, I just put a Pioneer DEH-P4800MP in my car, and I cant figure out the Aux input?
The head unit has one 3.5m stereo plug as the aux input.
If I put the stereo wire from the head unit to my mp3 player(ive tried a few different mp3 players) nothing happens, the head unit acts as if nothing happened. the manual said it should automaticly detect AUX but it doesnt, and I cant go to AUX through source either... is it defective or something?
Are you sure the headphone jack isn't for a wired remote? I believe most Pioneer head units require the CD-RB10 which hooks up to the cd changer input and converts that into RCA-in jacks.
I have the 5800 which doesn't have AUX in and when I used the PIE PIO/P-RCA Adapter it picked it up fine when I switched to AUX. I know on my old 4600 I had to go to the menu and turn AUX on but if it says it should auto recognize, then it should and if it won't even let you switch to AUX by pushing on the volume nob, then I'd say there might be a problem.