Help with trailer plug....
Thread Starter
|
Elder User
Joined: May 2007
Posts: 595
Likes: 0
From: South LA
Help with trailer plug....
'02 F350.....I have no brake lights on trailer, nor blinkers, but running lights are fine. All lights on truck work. My brake controller is not working (no trailer brakes) and the signal strength light is very dimly lit green (sometimes).
I checked all fuses in fuse panel...all wires are coonected and look ok on trailer plug. Any ideas on where to look next.
I'm kind of clueless on this stuff thx
I checked all fuses in fuse panel...all wires are coonected and look ok on trailer plug. Any ideas on where to look next.
I'm kind of clueless on this stuff thx
CO River Rat
Joined: Feb 2004
Posts: 3,209
Likes: 0
From: Lake Havasu City AZ
Because brake/turn signal lights and brakes require more amps than running lights, I'd guess you've got a trailer ground problem. Check the ground wire where it comes from the connector all the way to the trailer frame, looking for broken strands and a dirty/rusted ring connector or frame.
Steve
Steve
Postmaster
Joined: Aug 2005
Posts: 2,992
Likes: 2
From: Lancaster, MA
Have you checked your trailer plug with a test light to make sure it has power? Is it a 4 flat or a 7 round trailer plug? I'd assume it's a 7 round because you are talking about a brake controller as well. If you are getting power there then the problem is on the trailer. Like others have said make sure you check the under the hood fuses near the mster cylinder. Brake lights and turn signals run on the same fuses (one for the left side and one for the ride side). The parking lights are on a seperate fuse as well. It could be as simple as corrosion in the plug. Make sure you clean the terminals out really well with a good contact cleaner. Corrosion could also make your brake controller act up as well because it won't be getting a full contact.
Trending Topics
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
makomaker !! Are you even reading the answers to your questions? I'll trying PM'ing you to alert you to your post.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Laughing Gas
Joined: Feb 2007
Posts: 950
Likes: 6
From: Waco, Texas
You did not waste your time as I was having the same problem. Watching the thread solved my problem with corrosion deep in the female plugs, thanks all even though I did not start the thread!
Laughing Gas
Joined: Feb 2007
Posts: 950
Likes: 6
From: Waco, Texas
You got that right, the surface of the plug, looking at you looked good, but I had to kinda dig in there and pulled out a lot of corrosion. I then flushed it out with spray contact cleaner. it took quite some time to go thru all the slots and dig it out. I then shuved dielectric grease in there, liberally. I plugged it into the truck and it worked like a charm. Thanks again!