hi guys have a two year old zetor 7441 and the blower in the heater and the radio have stopped working . havent a manual so i changed all the fuses in the cab to the left and right of the stearing wheel and that did nothing . i think it must be a fuse . are their fuses for both the radio and heater under the cab? its annoying me as i neither have a radio or heater , can anybody advise please . thanks