D Group 37 Wiring diagram FL Example of wiring diagram Thin lines, wires. Connectors. 1 EJB connectors. 2 Pass through connector chassis-cab. 3 Others. OR ”It is an exclusive OR (only one possibility) between the different solutions (1 or 2 or 3), due to the configuration of the vehicle. Electronic Control unit. The inputs/outputs of ECUs are symbolized in the way described below: 2 alternative of digital output low (set to the ground). Digital output high (set to 24V, 5V...). Ground of ECU. Analog input. Active low. Active high. Ending resistance of communication bus CAN (120 ) 4