Where is the auxiliary input on a 2004 ford f150 Source Source Source Source Source Source Source Source Source Source Read Also: Auxiliary audio input 2004 ford f150 2004 Ford f150 auxiliary input Frd04-aux ford auxiliary audio input adapter aux button 2004 Pie frd04 aux 2004 2006 ford can bus auxiliary input Auxiliary input on ford f150 Frd04 aux 2004 2006 ford can bus auxiliary input converter