7 pin hookup on my 2006 eb

[EDAD]

Hi I'm a new owner of a 06 EB expy. It has the complete 4 pin standard tow package for 06. I will need to upgrade this to 7 pin for pulling my travel trailer. Ill want the charge line and electric brakes setup, and backup trailer lights. My main question to those who know is ,? are all the necessary harness connections already loomed in the car some where? Id hate to think about cutting and splicing. If the charge line is partially installed at the factory,what gauge is it and should I upgrade ? also what about the 110 amp alternator,is it enough or should a hd unit be swapped. Im only charging the tv battery and 1 for the trailer. thanks

 

[ELVATO]

Yours didn't come with both? Here I was thinking all of them got both.

They have conversion kits that let you use the 4 pin one and you just run a couple other wires.

Follow the 4 pin back and see if there are more wires there?

 

[Tigster]

My 06 has a 7, it is behind a little black hinged flap to the left of the hitch

 

[ELVATO]

Here's what you see when you look at the hitch.



Here's the wiring from behind. You can see the 4 pin and 7 pin "merge" together, and that loom goes out to the front.

 

[mtondreo]

My 06 does not have the 7-pin either. I am posting some instructions i got on this site or another one - but don't remember who gave them to me to give them credit. I have not done mine yet and not sure if I will, but here are the instructions. Hope it helps, Mike. I it is someone on this forum that gave these to me - please speak up and take credit.

A little more detail:
What I did to convert 4-pin to 7-pin trailer connector on a 2004 Expedition:
• Removed 4-pin connector from hitch (just slides out)
• Cutoff 4-pin connector bracket from hitch (ground down two small welds)
• Welded 7-pin connector bracket to hitch
• Painted entire hitch black
• Attached 7-pin connector to bracket on hitch
• Cut and strip wire feeding 4-pin connector (Note: This step could be avoided as some 7-pin connectors have a 4-pin connector input) Just plug in, I preferred to splice the wires together.
• Splice or attach the five wires to the 7-pin connector to the proper pins (Green, Yellow, White, Brown & Blue) Note: you may want to upgrade the white ground wire to 10 gauge (just like factory 7-pin)
• Look under the drivers side rear door, you will find two wiring harnesses there
• The smaller harness has an Orange wire going in one end of the harness but does not continue after.(pin12) This is the 12v lead
• Splice into the wiring harness orange wire and wire back to the 7-pin connector. I used 12 Gauge wire and protected it with wire loom.
• Note: The larger harness has a black/light green wire going in one end of the harness but does not continue after.(pin8) This is the reverse backup light wire if you want it. I did not so I did not wire.
• I then tye wrapped all the wires up and out of the way being careful that the wire does not get caught up in the rear suspension or spare tire movement.
• Remove fuse panel cover from front passenger foot area
• Install standard automotive type 30-amp relay into slot R05
• Install 30-amp maxi fuse into slot 106. I found a spare in slot 105
• Replace fuse panel cover.
• Connect brake controller wiring harness under the dash to your brake controller
• Checked all 7-pins with a meter to be sure I wired all correctly.
That’s all I did and everything works great. I have got trailer brakes and switched 12volt power in my travel trailer now.

Parts list:
• 7 pin connector (I got one with both 7 pin and 4 pin connections)
• 7 pin mounting bracket
• 30amp standard automotive relay
• 30amp maxi fuse (there was a spare in my fuse block that I used)
• 12 gauge wire from pass floor connector to 7 pin (12v lead)
• Wire loom to protect wire
• Trailer brake controller adapter for Ford Vehicles
All parts are available from just about any automotive store.

I don’t recommend trying this unless you are familiar with wiring.

 

[EDAD]

what are the colors of wires for 4 pin and 7 pin connections

hi I just noticed 3-4 more wires tucked up behind the hitch but its to snowy to lay down and look.I know what a whimp, Some one said blue was the brake controller wire. Looks promising though. Is there a wiring diagram for the 06 available here?

 

[ELVATO]

http://www.ford-trucks.com/forums/520986-1997-f150-2005-trailer-wiring-diagram-4pin-7pin.html

This might help. I think the correct one is post 10, though I'll check later in the wiring diagram. Or, if you want to do this now, test each wire with a DMM or test light to see what goes where.

 

[Solid_Hit]

My understanding is that the Expys come with a standard towing package but the HD package is on those with the 4 and the 7 pin hookups.

As for color, blue is always use to designate brakes.

 

[EDAD]

06 7 pin

I had an rv guy set me up we ran a # 8 charge line,# 10 ground line, resettable fuse and solenoid under the hood. then a new bargman 7 pin and harness.I opted to keep the stock 4 pin in place. This was a california Eb, and was a special order and has wierd options. It also does not have the factory air ride system ( a good thing) Im all set now though. thanks for the suggestions,happy towing.

 

[rvbuilder2002]

I had an rv guy set me up we ran a # 8 charge line,# 10 ground line, resettable fuse and solenoid under the hood. then a new bargman 7 pin and harness.I opted to keep the stock 4 pin in place. This was a california Eb, and was a special order and has wierd options. It also does not have the factory air ride system ( a good thing) Im all set now though. thanks for the suggestions,happy towing.

Depending on how heavy of a trailer you plan on towing, you may have not done enough. Depending on what type of road conditions you tow on (hilly versus flat) and how heavy the trailer is, you may want to think about installing a different transmission cooler.
The Gen2 Expys with the HD tow package (delivered with the 7 pin harness connector factory installed) come equipped with a 12 fin rows transmission cooler. The no HD tow Expys have an 8 fin rows cooler (33% smaller).

Look through you grill and see if the transmission cooler (the one towards the passenger side) has 8 rows of fins, or 12

If you only have the 8 row (likely) and you plane to tow anything other than a relatively light trailer (2500 lbs or less) it would be cheap insurance towards the longevity of you transmission, to add the larger one. I think the larger one is an easy direct replacement. Probably can be found in a wrecking yard.

 

[msquared]

My 06 does not have the 7-pin either. I am posting some instructions i got on this site or another one - but don't remember who gave them to me to give them credit. I have not done mine yet and not sure if I will, but here are the instructions. Hope it helps, Mike. I it is someone on this forum that gave these to me - please speak up and take credit.

A little more detail:
What I did to convert 4-pin to 7-pin trailer connector on a 2004 Expedition:
• Removed 4-pin connector from hitch (just slides out)
• Cutoff 4-pin connector bracket from hitch (ground down two small welds)
• Welded 7-pin connector bracket to hitch
• Painted entire hitch black
• Attached 7-pin connector to bracket on hitch
• Cut and strip wire feeding 4-pin connector (Note: This step could be avoided as some 7-pin connectors have a 4-pin connector input) Just plug in, I preferred to splice the wires together.
• Splice or attach the five wires to the 7-pin connector to the proper pins (Green, Yellow, White, Brown & Blue) Note: you may want to upgrade the white ground wire to 10 gauge (just like factory 7-pin)
• Look under the drivers side rear door, you will find two wiring harnesses there
• The smaller harness has an Orange wire going in one end of the harness but does not continue after.(pin12) This is the 12v lead
• Splice into the wiring harness orange wire and wire back to the 7-pin connector. I used 12 Gauge wire and protected it with wire loom.
• Note: The larger harness has a black/light green wire going in one end of the harness but does not continue after.(pin8) This is the reverse backup light wire if you want it. I did not so I did not wire.
• I then tye wrapped all the wires up and out of the way being careful that the wire does not get caught up in the rear suspension or spare tire movement.
• Remove fuse panel cover from front passenger foot area
• Install standard automotive type 30-amp relay into slot R05
• Install 30-amp maxi fuse into slot 106. I found a spare in slot 105
• Replace fuse panel cover.
• Connect brake controller wiring harness under the dash to your brake controller
• Checked all 7-pins with a meter to be sure I wired all correctly.
That’s all I did and everything works great. I have got trailer brakes and switched 12volt power in my travel trailer now.

Parts list:
• 7 pin connector (I got one with both 7 pin and 4 pin connections)
• 7 pin mounting bracket
• 30amp standard automotive relay
• 30amp maxi fuse (there was a spare in my fuse block that I used)
• 12 gauge wire from pass floor connector to 7 pin (12v lead)
• Wire loom to protect wire
• Trailer brake controller adapter for Ford Vehicles
All parts are available from just about any automotive store.

I don’t recommend trying this unless you are familiar with wiring.

Thanks for the great info!
I installed a 7-pin plug over the weekend without any problems on my '06 Eddie Bauer. Put in new relay & fuse, pulled apart connectors under driver-side passenger door & used multimeter to confirm the two pins were the same as above (they were). Got 12' of #10 & #14 wire and put inside a wire loom. Ran it along side other wire loom & wire tied them together. Cut & spliced both ends...done. Took a few hours.