Trailer Light Plug Help??
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 122
Likes: 0
From: La Grange, TX
Trailer Light Plug Help??
The big round one...that I've never used... on my 01 PS 7.3
It doesn't work, the small flat 4 does, as do 2 flat 4 ones that I"ve wired in.
I now have a trailer that needs that big connection, where do I start looking? I've done all the fuses. Seems that its gotta be something fairly simple that I'm overlooking somewhere.
Thanks, Jeff
It doesn't work, the small flat 4 does, as do 2 flat 4 ones that I"ve wired in.
I now have a trailer that needs that big connection, where do I start looking? I've done all the fuses. Seems that its gotta be something fairly simple that I'm overlooking somewhere.
Thanks, Jeff
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Originally Posted by PaysonPSD
You didn't overlook the under hood fuses did you?
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 122
Likes: 0
From: La Grange, TX
Checked ALL fuses, but did not know about the relays.... only checked what was installed, did not read further.
Have no brake controller yet, but do seem to have a pigtail and there may be relays in that bag, will definitely look. I was thinking it almost had to be something like that.
No juice with a voltmeter or test light...
Thanks, Jeff
Have no brake controller yet, but do seem to have a pigtail and there may be relays in that bag, will definitely look. I was thinking it almost had to be something like that.
No juice with a voltmeter or test light...
Thanks, Jeff
Post Fiend
Joined: Feb 2007
Posts: 7,191
Likes: 4
From: Blairsville,Ga
think lights are supose to work without the extra fuses and relays
where I found my problem,the seven prong plug plugs into the harness at the bracket right at the plug and that plug was corroded
it done this in a matter of weeks
where I found my problem,the seven prong plug plugs into the harness at the bracket right at the plug and that plug was corroded
it done this in a matter of weeks
Trending Topics
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
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
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
Originally Posted by zx250
Check fuses 3,4 and 8 under the hood. In mine the relays were there, just not fuse #8. The relay are under one of the two little black covers beside the main fuse block.
Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
Likes: 2
From: Concord NC
Nope, just helping a friend straiten his mess out. I still have the fuse diagram and his was a 01. Your right about #1, I missed it. Here's the layout for trailer fuses and relays under the hood.
#1 Trailer Tow Left Stop/Turn Lamp
#3 Trailer Tow Right Stop/Turn Lamp
#4 Trailer Tow Back Up Lamps/Trailer Tow Park Lamps
#8 Trailer Tow Electronic Brake Illumination, Park Lamp, Trailer Tow Park Lamp Relay Coil.
All of the above are mini fuses.
#38 and #39 are relays, 38 is a trailer tow backup lamp relay, and 39 is a trailer tow battery charge relay.
Yours may be like my buddies and some one disconnected the 7 round plug from the harness to wire a 4 flat in line with rear lights. It works for 4 wire, but to use all 7 wires, in could brakes, battery charge, and backup lights, you need the fuses and relays under the hood.
#1 Trailer Tow Left Stop/Turn Lamp
#3 Trailer Tow Right Stop/Turn Lamp
#4 Trailer Tow Back Up Lamps/Trailer Tow Park Lamps
#8 Trailer Tow Electronic Brake Illumination, Park Lamp, Trailer Tow Park Lamp Relay Coil.
All of the above are mini fuses.
#38 and #39 are relays, 38 is a trailer tow backup lamp relay, and 39 is a trailer tow battery charge relay.
Yours may be like my buddies and some one disconnected the 7 round plug from the harness to wire a 4 flat in line with rear lights. It works for 4 wire, but to use all 7 wires, in could brakes, battery charge, and backup lights, you need the fuses and relays under the hood.