Hello, we have a problem with the bulldozer CAT D6N ALY01551. When starting the engine, the starter buzzes for about 2 seconds and stops. We changed the starter - the problem is not solved. We changed the wires 265-2733 (I am attaching the drawing) - the problem is not solved. We changed the start relay 125-1302 - the problem is not solved. But if we short circuit the starter relay, the engine starts On top of all that we can't connect the software to the bulldozer and we can't see what errors it shows maybe someone is facing a similar problem? Thanks.
Does the SERV CODE icon stay illuminated after the panel self test.? This is the process that happens when you first turn on the key. Do you have an electrical schematic.? If you do not, would you like one.?