Same wire as Costal. We had a 06' STX 530. Mufungo grew in that wire off the Alternator. We had to replace that harness. We 1st noticed low voltage on Deere 2600, ATU and ITC. (Ran Deere ATU auto steer) The auto steer would alarm on screen "low voltage" and kick out. First we jumpered power to the cab. Next we ran a jumper from the Alt. to the batteries. That corrected the problem. We ordered  that harness. When it came it was a upgraded part similar to the harness that was on a 535 we had. Another CIH mystery called dealer first. 6 magic words. Never seen one do that before !!!!!! WTF