I HAVE A 94 HUMMER WAGON THAT DOES NOT CHANGE OUT OF FIRST GEAR. I KNOW IT IS AN ELECTRICAL PROBLEM RELATED WITH THE TRANSMISSION CONTROL MODULE. DOES ANYONE KNOW WHERE I CNA GET WIRING DIAGRAMS ON THIS RELATED ISSUE OR HAVE ANY IDEAS WHAT THE PROBLEM MIGHT BE. THE SPEEDO DOES NOT WORK EITHER. THANKS.....JAN.