DTC B0193- HVAC Blower Motor Speed Circuit Inoperative on YUKON TAHOE SIERRA ESCALADE 2015 2016 2017 2018 EASY Fix and AMAZING Diag.
No Air flowing Thru Air Ducts because of a Faulty HVAC Blower Unit. Blower Unit on The GMC YUKON, SIERRA , Chevy Tahoe, Suburban AND Cadillac Escalade operate on 3 wire Circuit. The Blower speed is controlled by HVAC unit which supplies PWM Ground to the Blower Unit. These vehicles have 3 Circuit Blower Unit.
Red Wire circuit is for Battery Positive Voltage.
Black wire circuit is for Ground
Dark Blue wire Circuit is control circuit which control the blower speed.
If all the circuit tests normal, replace the Blower Unit.
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5 июл 2024
