08 fj head unit in 87 4runner

I have installed the radio from my wifes o8 fj, non fjammer, into my 87 4runner.I have been trying to utilize the aux plug for the 4runner, i purchased a 3.5mm panel jack, and the male counter part for the mp3 player, i also scavanged the plug that goes the the back of radio and wired it all up.but the unit will not let me select aux?????? any ideas?osmrquick

There is a switch in some aux jacks.  If it does not see a cable plugged into it, it will not let it switch to that source.  Were there more than 3 wires on the plug that was on the FJ?

no there were only three

osmrquick

this pic was borrowed from another post on fj crusier forums. this is the back side of the factory aux plug.

osmrquick