04 Stock radio AUX input
#11
Here is the exact one i used on my 04 lariat with audiophile system.
Took like 15 mins to install works great.
Amazon.com : PAC AAI-FD4 Auxiliary Input Adapter for Select Ford/Lincoln/Mercury CAN-BUS Factory Radios : Vehicle Audio Auxiliary Adapters : Car Electronics
Took like 15 mins to install works great.