I'm replacing the 7 way connector on my 2003 duramax equipped silverado. The existing wiring harness has partially melted due to a car that caught fire behind me in a parking garage. I have looked at what's left of the wiring harness on the back side by the connector and have determined the following colors to exist:

yellow
blue
black
red
brown
light green
dark green

Does anyone know how which is which for each color? The connector is completely melted and will need to be cut back a ways to install a new one.

lt= light, dk=dark
brown=parking lamps
lt green=back up lights
dk green=right turn
yellow=left turn
dk blue=trailer brakes
red=battery
black=ground
lt blue=3rd brake light---not used in 7 way

Typical Cable Seal n/a
Pin Wire Color Circuit No. Function
A LT GRN 1624 Trailer Backup Lamps Supply Voltage
B BLK 1750 Ground
C DK BLU 47 Trailer Auxiliary Supply Voltage
D DK GRN 1619 Trailer Right Rear Turn/Stop Lamp Supply Voltage
E RED 742 Battery Positive Voltage
F BRN 2109 Trailer Park Lamps Supply Voltage
G YEL 1618 Trailer Left Rear Turn/Stop Lamp Supply Voltage

Here is what you will need to know to put a new aftermarket plug on

wire color / label inside new plug
yellow - red
blue - blue
black - white
red - black
brown - green
light green - center
dark green - brown

lt= light, dk=dark
brown=parking lamps
lt green=back up lights
dk green=right turn
yellow=left turn
dk blue=trailer brakes
red=battery
black=ground
lt blue=3rd brake light---not used in 7 way
The green (terminal) on the plug itself is tail/marker/clearance lights. The brown (terminal) is right turn
http://www.rverscorner.com/wiring/7pole.html

The green (terminal) on the plug itself is tail/marker/clearance lights. The brown (terminal) is right turn
http://www.rverscorner.com/wiring/7pole.html
if youre putting an aftermarket plug on this is right. if factory plug the colors listed are right. trailerpro's color chart is what you need to follow for aftermarket...left side =factory, right side= aftermarket

if youre putting an aftermarket plug on this is right. if factory plug the colors listed are right. trailerpro's color chart is what you need to follow for aftermarket...left side =factory, right side= aftermarket
You may be correct, but everyone should know the color code almost all major trailer manufacturers use to wire the round 7 flat pin connector. Auto mfgrs. tend to use brown for tail and green for rt turn. Also don't forget yellow in the center for back up light on the trailer side:) I have been wiring up trailer plugs and fixing people's screw ups for as long as I could walk....lol

You may be correct, but everyone should know the color code almost all major trailer manufacturers use to wire the round 7 flat pin connector. Auto mfgrs. tend to use brown for tail and green for rt turn. Also don't forget yellow in the center for back up light on the trailer side:) I have been wiring up trailer plugs and fixing people's screw ups for as long as I could walk....lol
you had to wait till you could walk huh? bummer lol. knowing the aftermarket color code does you no good if you dont know gm's color code which is what he wanted and what i posted. of course mr. meter is your friend but this way is easier and quicker

you had to wait till you could walk huh? bummer lol. knowing the aftermarket color code does you no good if you dont know gm's color code which is what he wanted and what i posted. of course mr. meter is your friend but this way is easier and quicker
Well I guess now he has all the info to help him install an after market, or factory plug and have it function properly...do you agree? Relax..

Well I guess now he has all the info to help him install an after market, or factory plug and have it function properly...do you agree? Relax..
yeah which was covered in the 2nd, 3rd and 4th post. do you agree? you relax

Look pal, check out the times the posts came in. I was looking for a diagram to actually give him something to look at and then posted right on top of the others. What's your deal! There was nothing offensive in my post towards you. Go ahead you can have the last word in this because I think we see where this is going!

Why not splice one of these in????

http://www.dieselplace.com/forum/showpost.php?p=3171834&postcount=4


But the rear section can be replaced with either:

NAPA 755-1426 4' Rear harness kit
NAPA 755-1427 7' Rear harness kit

both of which are readily available.

Trailer Wire Harness Adapter - Tow Vehicle
Front
Part: BK 7551426 Product Line: Balkamp This part can only be purchased from your local NAPA Auto Parts store.