A method for determining an operational status of an electrical load configured to be electrically supplied by an electrical network of a heavy-duty vehicle, the electrical network comprising at least one electrical energy storage system and one electrical generator, the method comprising preliminary steps consisting in: - (a) measuring a global current consumption of the electrical network, - (b) detecting an activation or a deactivation of the electrical load, - (c) measuring the global current consumption of the electrical network after the electrical load has been activated or deactivated, characterized in that the method comprises additional steps consisting in: - (d) determining the current consumption (I_L) of said electrical load from the measured global current consumptions (I1, I2) before and after said electrical load has been activated or deactivated, wherein the above preliminary steps (a) to (d) are reiterated at least two times in order to obtain at least two values representative of the current consumption of the electrical load, said at least two values being saved in a memory, - (e) calculating a reference current consumption (I_Ref) of the electrical load as a function of the at least two values saved in memory and saving said reference current consumption (I_Ref) value in memory, - (f) at each new activation or deactivation of the electrical load, determining the electrical current consumption of the electrical load by comparing the global current consumption of the electrical network before and after said electrical load has been activated or deactivated, - (g) calculating the difference (d) between the current consumption (I_L) of the electrical load and the reference current consumption (I_Ref), - (h) if the difference (d) is higher than a first predetermined threshold and lower than a second predetermined threshold, the second predetermined threshold being higher than the first predetermined threshold, set the operational status of the electrical load to a first status called "nominal operation". - (a) measuring a global current consumption of the electrical network, - (b) detecting an activation or a deactivation of the electrical load, - (c) measuring the global current consumption of the electrical network after the electrical load has been activated or deactivated, characterized in that the method comprises additional steps consisting in: - (d) determining the current consumption (I_L) of said electrical load from the measured global current consumptions (I1, I2) before and after said electrical load has been activated or deactivated, - (d) determining the current consumption (I_L) of said electrical load from the measured global current consumptions (I1, I2) before and after said electrical load has been activated or deactivated, wherein the above preliminary steps (a) to (d) are reiterated at least two times in order to obtain at least two values representative of the current consumption of the electrical load, said at least two values being saved in a memory, - (e) calculating a reference current consumption (I_Ref) of the electrical load as a function of the at least two values saved in memory and saving said reference current consumption (I_Ref) value in memory, - (f) at each new activation or deactivation of the electrical load, determining the electrical current consumption of the electrical load by comparing the global current consumption of the electrical network before and after said electrical load has been activated or deactivated, - (g) calculating the difference (d) between the current consumption (I_L) of the electrical load and the reference current consumption (I_Ref), - (h) if the difference (d) is higher than a first predetermined threshold and lower than a second predetermined threshold, the second predetermined threshold being higher than the first predetermined threshold, set the operational status of the electrical load to a first status called "nominal operation". - (e) calculating a reference current consumption (I_Ref) of the electrical load as a function of the at least two values saved in memory and saving said reference current consumption (I_Ref) value in memory, - (f) at each new activation or deactivation of the electrical load, determining the electrical current consumption of the electrical load by comparing the global current consumption of the electrical network before and after said electrical load has been activated or deactivated, - (g) calculating the difference (d) between the current consumption (I_L) of the electrical load and the reference current consumption (I_Ref), - (h) if the difference (d) is higher than a first predetermined threshold and lower than a second predetermined threshold, the second predetermined threshold being higher than the first predetermined threshold, set the operational status of the electrical load to a first status called "nominal operation".