Gentlemen,
I need help. I am looking for the speed sensing wire for a 03 F150 KR SCrew. There is no such wire behind the radio. I checked the harness over and over. I am installing a NAV system and I need this wire. Any help??

 

I'm shure you're king ranch will have a premium radio in it. The premium system uses speed sensor out put to adjust speed sensative volume control. Look at the radio connector, pin number 9 should have a gray wire with a pink tracer on it this will be from the speed sensor circuit of the computer.

 

thanks that was it!!