trailer wiring harness

[mjm]

I'm looking for guidance on installing an in the bed plug for a fifth wheel wiring harness. I have an 08 F450. I can't find a factory pigtail under the truck. Does ford not prep the harness for an in the bed plug? I'm used to chevy's so I need some help. I installed the hitch and I just need to figure out what to do about the harness. Thanks for any shared info.

[Blue01F250]

On my '01 - had to splice into the trailer plug at the rear of the truck and run the wires up to the plug in the side of the bed...

[dieselmt]

One thing to remember is make sure if you use butt connectors tape them up so moisture cannot enter into the connectors or it will set the trlr. warning message on every time you hit the brakes or turn the key on. We have been having alot of problems w/ water intrusion getting into the rear plug in the back. That would be the first place to look if you ever encounter a problem w/ the trlr. warning icon comes on. The plug assy. will have to be replaced. Ford highly recommends soldering the wires for the bed adaptor & using heat shrink tubing cause the trlr. module is very sensitive to moisture. That is right from the engineers mouth.

[Dave]

call the dealer parts dept i bet it is like mine was where you get the harness that plugs into the back of the bumper one to bring it up there

[Blue01F250]

hrmm.... that woulda been nice... lol

I'll take pics tomorrow of mine

[spburns]

My '08 CC was bought to pack my camper, pull my boat, haul the 5th wheel. I've wired older box plugs for the camper before, and unless you do it regularly it can drive you nuts, even with the right wiring diagrams - most of us can fumble through it if you own and can use a simple multitester, but we do it so seldom it's hard to remember the things you swore you'd remember for next time! I didn't even attempt this one, just took it to the local RV dealer and said "wire it." Cost $120 and it all works - a no brainer to me. I earn that by going to work for only a week or so.