AC wiring schematic | Chevy Tahoe Forum | GMC Yukon Forum Oh the accumulator. the swith on that is the a/c cycling switch. it carries no power but just switches a ground on and off really. it has a black/whita and dark green wire. you can disconnect its plug and jump the connector to see if you can get the clutch to kick in. if it does not work when shorted together or not then the problem lies elsewhere. Tahoe / Yukon / GM truck (GMT-800) Blower Switch Click to view on Bing45:28Perform surgery on a GM blower switch that I am too cheap to replace. Includes wiring diagram, troubleshooting tips, and some bad language. * UPDATE Septembe..Author: Eddie the GrouchViews: 134K SOLVED: Need diagram of a/c blower motor for 2000 GMC - Fixya Need diagram of a/c blower motor for 2000 GMC Yukon Denali, newer body style, 4wd, 5.3 liter. Videos on youtube showing how to do it . Does your Yukon have manual or automatic Heater/AC system ? Could be the blower motor is bad , blower motor control module 1999 Yukon Denali spark plug wiring diagram. 2000- Gmc Yukon Vehicle Wiring Chart and Diagram Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 2000- Gmc Yukon information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle.