Have an '08 with the factory class IV hitch. Brochure says it has 4 & 7 pin connectors and brake hook-ups. I can only see a flat 4pin and the brake wire. Where is the 7pin?? Do some not have it? Can I add it easily? Thanks.
Nothing there. Mine is a US model and the brochure I have is for a Canadian model. Seems the trailer towing package is only standard on the Canadian models. Owners manual says it's optional on this one. Only the 4 pin connector is standard. I'd like to at least have the 7 pin connector so it hooks to the trailers I have with 7 pin.
You have the Class III system, not the Class IV or HD Towing Option.
There should still be an electric brake controller under the dash and the blue wire should be back by the hitch "blunt cut, dipped, and taped." Any RV dealer will have the required round 7-pole adapter kit that will plug into the 4-pole boat trailer socket and have pigtails for the other connections.
HD Tow has all poles in the connector active, fused, and relay protected. I'll have to search to see if I have the wiring diagram.
According to the Ford Towing Guide HD Tow boosts maximum towing capacity from an Explorer-like 6000 pounds to 9000 pounds. You must install the HD transmission radiator to get this boost in capacity. Also includes the wiring harness and a larger engine coolant radiator. At least one forum member had the transmission and engine radiators fitted at his Ford Dealer, they're standard parts. I recall he has a "Chevy" style forum name. Use the search function.
Thanks Chuck (and others). I actually just made and installed the component you described last night from parts I had here on the shelf. I didn't connect the two 12 volt wires, though, so I actually have what acts like a 5 pin. I'm curious about the blue wire, though.? I didn't connect the "blunt cut, dipped, taped" wire yet. Are you telling me that if I simply connect it, my brakes will work? Don't I need to buy a controller box and install it in the cab? Or, are you saying (There should still be an electric brake controller under the dash) there already is one hidden under the dash somewhere??
The hitch itself is marked "Class IV 6000lbs". I don't plan to install the larger rad and likely not the cooler, either. I have a heavy truck for towing, but just want the option to use a light trailer if the need ever arises. I have all my trailers converted to 7 pole plugs just for convenience sake, so I wanted to put 7 on the Expedition as well.
You have to supply the brake controller. Tekonsha I recommend you spend the extra $$$ on the proportional model instead of the inertia based. The P3's seem to be the most common. There's a connector under your dash. You order a brake controller, and that companies harness (the harness will plug in to your connector under the dash, and into their product). http://www.tekonsha.com/files/Vehicl...s%20042308.pdf From that chart you want part number 3035P. That's your wiring harness.
The blue wire must be plugged into your 7pin for this to work by the way :P.
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I highly recommend the P3 controllel, works very well. You can convert the 4 pin to the 7 pin with a simple adapter kit. I did it on my 07 and works just fine. Be sure you have a good ground and very tight and moisture free connection for the trailer brake (blue wire), otherwise it will cause the trailer brakes to short occasionly. (learned the hard way)
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