DZ15221840412A Speed Control Module For SHACMAN L5000 M3000S Truck Spare Parts Product Introduction This speed control module is the electronic control component for cab heater blower of SHACMAN L5000 and M3000S. It adjusts blower rotation speed, controls air volume of heating and ventilation system, and provides comfortable temperature environment inside cab. Product Benefits OEM plug interface and mounting hole positions match L5000 & M3000S for direct plug-and-play