on my 01 ,with the towing package,i installed a 7 way plug in the bed side. wasn't sure which wires to splice into at the frame so i've been running a long length of 7 wire with a male plug on the end and connecting in the plug under the bumper. anyone got the color codes so i can splice it in right below where i put the plug in the bed? i could do it with a test light but figured this would be easier. thanks