1993 FZJ80 265K. Scratching my head - neither front windows will go up or down. All were working fine until i went to replace the front left window support channel, and they simply quit. The Master Control Switch works on the rear windows just fine, as well as the door lock. I tried a new MCS but that did not fix it. I searched for broken/split wires but no luck. Anyone experience this, and have some advice or solution? I have poor electrical skills.