The low beam headlights of my 1999 Expedition do not work. The high beam headlights work. The multifunction switch is working correctly. I have traced the wiring for the low and high beam to the fuse block. The high beam wiring is noted correctly on my schematic. For the low beam, the schematic shows one red/yellow wire from the head light switch and one red/blk wire from the multifunction switch to fuses 26 and 28. In actuality, there are two red/yellow wires, but no red/blk wire. One red/yellow is from the headlight switch, and the other works as the red/blk on the schematic shows. Finally, there is a red/blk wire that goes to the fuse block in the correct location for the fuses. Where is this transition made?

Optional Information:
Year : 1999
Make : Ford
Model: Expedition
Engine: 4.6L V8 W