2004 Expedition - 3 wiring harness diagram for radio

[Jeremy L Gunn]

I just decided to put a bluetooth radio in my 2004 Expedition. I ordered the radio and wiring harness but when I got everything apart, I found I have 3 plugs going into my radio. The harness I received only had 2 plugs. Does anyone have a wiring diagram or know what the 3rd harness might be for? I was thinking it might be for the steering wheel controls, but wanted to make sure I had the right kit before I started splicing the radio harness to the adapter harness.

 

[GAINMOB]

one of the plugs wont be used...i always get my harnesses from crutchfield.com...check their site and see what harness they have for the truck but i know im not using one of mine and my pioneer AVIC-D3 worked and played fine w/o it and now my pioneer 8200NEX works and plays without it as well

 

[Hamfisted]

I just decided to put a bluetooth radio in my 2004 Expedition. I ordered the radio and wiring harness but when I got everything apart, I found I have 3 plugs going into my radio. The harness I received only had 2 plugs. Does anyone have a wiring diagram or know what the 3rd harness might be for? I was thinking it might be for the steering wheel controls, but wanted to make sure I had the right kit before I started splicing the radio harness to the adapter harness.

Do you have a rear entertainment DVD player ? When I installed my Pioneer Nav system the third harness plug was for the rear entertainment system and required another adapter harness from Crutchfield.