Hi guys as stated in the title my komatsu Dozer is facing an engine "no crank" problem. So I checked power supply to main relay and it is fine. I am still trying to figure out how the starter relay or starter motor key crank signal functions. I tried turning starter with B+ signal wire jumper and engine starts up just fine. If someone has a schematic of this machine or can tell fault of dozer I will very much appreciate it. Looking forward for a positive feedback. Thank you all in advance.
Have you checked the coil side of the main relay ? Both ground and power
I have ground and power coming through coil. What I don't understand is the single wire on top of the relay. How is it supposed to work?
Sending you start circuit schematic by PM.
Welcome to the Forums Gb! Glad to have you. Moved this thread over to the Dozer forum. Best of luck!