Jags830

Hi Everyone, I am in need of some serious help and hoping someone can help me.
I have a 2016 Jayco Greyhawk 29ME. The Jensen stereo was giving me issues and I purchased a Pioneer. I have it almost completed except I cant find the ford speed signal wire to connect to the Pioneer stereo/GPS. According to Pioneer and other aftermarket Stereo/GPS systems the speed signal is required for accurate GPS operation. I have tried calling Jayco, Pioneer, Crutchfield and Ford. All give me a different story but none give me a sure location/wire to connect to. Can anyone help me with this wire location?