Pelican Parts Forums - 3.6 wiring/dme questions

i am wiring my1990 3.6 into my early car and have a question to those that have done it. i am following steve timmons wiring diagram but i do not see a color on his chart and i know it was hooked up. the engine was installed in a sc and i know it was hooked up before. out my harness i have these colors red,green,black(looks dark blue) yellow. the yellow is the one in question. per steves directions the red is 12v to battery, the green is to the fuel pump,black is 12v switched,violet is the tach,brown gets grounded at the relay and ther is another blue and white wiring i am not to sure about either. there is no yellow wire in his conversion harness diagram. it appears to be hooked up to a 12v source before as it had a fuse inline. can anyone chim in on this as i would like to try and start the car today.......if anyone needs pictures i will go out and snap a few to show......thanks, brent