Anyone know what the extra plugs are for on the 1999 f150 dash harness are for. I know they are probably additional features that I don't have. Am curious as to what they are. Features I do have. Power locks/windows, Tape deck no cd changer, Manual HVAC and thats it. They are located center of dash behind were the radio sits. There are 2 black and 1 grey plug each with approx. 10-14 wires. Anyone have a clue?

 

10-14 wires each? Hmmm... My first thought was sunload relay for the digital climate control or light sensor for the auto lamp feature, but I don't think either of them have that many wires.

 

That is what I was thinking. Something for the Auto HVAC which would be awesome as I would love to convert to that. I was also thinking it is for the overhead console some of us have in our truck. Maybe one of the experts can chime in. I can take pics or get colors if needed.

 

where are they located?

 

3 inches to the left of where the Radio and HVAC wires come out of the main controls.