I am new to the forum and to Ford Trucks. So a couple of simplistic questions. If the 03 SuperCrew I am buying has FX4 package, what all does this include? Particularly as to axles, etc/ Secondly, how can I determine about the towing package it has? It does have the frame attached hitch and both 7 and 4 wire harnesses.

 

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Thank You

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You can check the driver's door edge for the factory sticker and see what the diff gearing is. As for the tow....if it has the factory 7 pin and 4 pin, and the receiver under the bumper, then you have the main part of the tow package. Also check for a tranny cooler. If so..then it is the full package. The 7 pin also allows for trailer brakes, 12v supply to charge a trailer battery and backup lights. BUT...(there is always a catch), you will probably need to add the relays/fuses to the main battery junction box under the hood. They look like fuses but are relays and cost about $4 or higher depending on where you get them. Should you decide to pull a trailer with electric brakes, you can also activate those with a relay/fuse but you will also need to purchase a brake controller. This is the easy part though. You can get just about any aftermarket controller, then go to your dealer and for about $12, get a harness for the brake controller. This will be a manual wiring connection to the brake controller but the other end plugs right into a factory harness under the dash so it goes through the factory harness to the back. Nice setup so you don't have to modify the factory wiring.