MERCEDES BENS 2638 - NÃO ACIONA O FREIO MOTOR - MÓDULO ADM - MANUTENÇÃO

In this video, we show a Mercedes-Benz 2638 truck ADM module that was not activating the engine brake. After a detailed analysis with the help of automotive electricians, it was found that the module was not activating the top brake solenoids and the engine brake solenoid. After replacing the module's MOSFET transistors, the engine brake started working again. Each solenoid is powered by 24V from the ignition switch; the solenoids are activated by the negative terminal, which is switched by the module.