Truck is wired for electric brakes, trailer is not. trailer is just wired for lights right now. trailer does have electric brakes just not wired to plug.
SOURCE: Hooked my 2007 Sprinter camping trailer to the
Is this a 4 way or 6 way connection system? If your truck is wrong, then all factory equipped trailer package harnesses would be wrong, tell your trailer guy...I don't think so.
Is this the first trailer you have hauled?
Let me know, and we will go from there.
REgards,
SOURCE: Looking for a wiring diagram for a 2006 Ford Expedition
7way- black is 12volt (power), brown, running lights, yellow is left turn signal and stop light, green is right turn signal and stop light, white is ground, blue is brakes, and orange is aux power (can be back up lights, if trailer equipped w/ them). 6way is the same, minus orange wire. I have run into some variations to the above color codes (brown, yellow and green only-sometimes these 3 are different than stated, but only mixed as that group, as to what they control- example would be green is running lights, brown and yellow are turn signal and stop lights, the others should be as stated), if you have any trouble with things not working properly, it may be due to these variations, although the above are pretty standard. If you have an ohm meter you can check as you go (check for power at black wire- should be constant 12v, turn on turn signal and check for power-it will fluctuate from approx. 12 volts to 0 volts as the signal power pulses in the wire) hit the brakes, blue wire should show power, etc. Let me know if you need more help as you go.
SOURCE: wire diagram 4 pole round
Here's a link to the info you need
http://www.accessconnect.com/trailer_wiring_diagram.htm
SOURCE: Wiring diagram for electric trailer plug at rear
yellow will be for a battery charge wire for the break away? read the plate on the plug , this is just a big 6 plug trailer plug but the put 1 in the center for back up lights.
SOURCE: hooking uo trailer lights
the back plug in on the truck most of the times on gm trucks has the wiring diagram printed on them
brown=running light
yellow=lt turn
green=rt turn
white=ground
your auto parts store also has a quick t plug that gives you a plug and play option/ or there is also a 7flat to 4 prong converter both are under $20
6 pin socket
6 pin plug
7 pin
socket
7 pin plug
5 pin socket
5 pin plug
7 pin socket
7 pin plug
7 pin socket
7 pin plug
7 pin socket
7 pin plug
12 pin socket
12 pin plug
small 6 pin round plug
& socket
1 tail, clearance - brown
2 left hand turn - yellow
3 right hand turn - green
4 stop - red
5 electric brakes - blue
6 earth - white
small 7 pin
round plug & socket
1 left hand turn - yellow
2 reverse -
black
3 earth -
white
4 right hand turn - green
5 electric brakes - blue
6 stop - red
7 tail, clearance, side
markers - brown
round socket
large 5 pin round plug & socket
2 left hand turn - yellow
3 earth -
white
5 right hand turn -
green
6 stop - red
7 tail, clearance, side
markers - brown
large 7 pin
round plug & socket
1 left hand turn - yellow
2 reverse -
black
3 earth - white
4 right hand turn - green
5 electric brakes - blue
6 stop - red
7 tail, clearance, side
markers - brown
7 pin round
heavy duty plug & socket
1 earth -
white
2 left hand rear , clearance and marker - black
3 left hand turn - yellow
4 stop - red
5 right hand turn -
green
6 right hand rear , clearance and marker - brown
7 reverse/auxilary -
blue
7
pin flat plug & socket
1 left hand turn - yellow
2 reverse -
black
3 earth - white
4 right hand turn - green
5 electric brakes - blue
6 stop - red
7 tail, clearance, side
markers - brown
flat socket
12 pin flat
plug & socket
1 left hand turn - yellow
2 reverse -
black
3 earth - white
4 right hand turn - green
5 electric brakes - blue
6 stop - red
7 tail, clearance, side
markers - brown
8 battery supply -
orange
9 auxiliaries - pink
10 earth - white
11 rear fog lamp - grey
12 auxiliaries - violet
4 way flat molded connectors allow basic hookup for three lighting functions; right turn signal / stop light (green), left turn signal / stop light (yellow), taillight / license / side marker (brown) and a ground (white).
4 way tow vehicle side.
4 way trailer side.
5 Way Systems
Same as 4 way system listed above but adds a extra blue wire for brake signal or auxiliary power. Used on pop up camper trailers or utility / boat trailers.
5 way tow vehicle side.
5 way trailer side.
6 Way System, Rectangle Plug
3/4 inch by 1 inch 6 way rectangle connectors right turn signal (green), left turn signal (yellow), taillight (brown), ground (white). The red and blue wire can be used for brake control or auxiliary. Use on a small motorcycle trailer, snowmobile trailer or utility trailer. Can also be used as custom wiring on trailers with 3 light/wire systems. See "Tow Vehicle Taillight Wiring" below.
6 way tow vehicle side.
6 way trailer side.
6 Way Systems, Round Plug
Round 1 1/4" diameter metal connector allows 1 or 2 additional wiring and lighting functions such as back up lights, auxiliary 12v power or electric brakes. Note: The black (sometimes red) 12v and blue electric brakes wire may need to be reversed to suit the trailer. Check with a test light or VOM. Uses: horse trailer, travel trailers, landscaping trailer, car trailer, etc.
6 way tow vehicle side.
6 way trailer side.
7 Way Systems
Round 2" diameter connector allows additional pin for auxiliary 12 volt power or backup lights. Uses: heavy duty landscaping trailer, car trailer, boat trailers, horse trailer, travel trailer, construction trailer, etc. Check with a test light or VOM.
7 way RV flat blade tow vehicle side.
7 way RV flat blade trailer side.
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