Turkey

I did a search on a couple forums and came up with nothing on this so here is the question:

2009 Lariat - message centre diagnostics showing "trailer wiring fault". This just started a week ago but doesn't come up every time I drive. I have not had a trailer hooked up to it. Washed the truck last week so it may be a moisture issue.

Anyone else have this or heard of it?

kmac1036

check the plug receptacles, flip the covers open, look for ice.

mpd2000

Ford has issued (Technical Service Bulletin) TSB 09-5-6 on trucks built before 12-1-2008 that exhibit that same message. The dealer should be able to replace the trailer wiring harness to fix this issue under warranty. I have had this same issue on my 11-08 built F-150 when the truck is driven in the rain/snow. I plan on having the dealer perform this fix at the next oil change.

Abn150

Don't think I've ever seen a first post that was so informative or helpful. Thanks.

Mad Mike

Is there a web site you can go to to read all service bullitins written for a particuliar year?

FastZR1

I use All Data (www.alldatadiy.com) but you do have to pay for it. All Data does include a lot of information when you purchase it.

Turkey

The dealer ended up changing out my trailer receptacle. Figured it was just a moisture issue but easiest fix is to replace.

Time will tell if it happens again.