R_O_M
Guest
Are you going yet STTIJ I would get that alternator rechecked. Could be diode going out or maybe, if you did not replace the alternator bearings, which we do almost every season, a bearing may be on the way out. Alternatively one of the batteries could also be going bad. Next, check for any evidence of a nasty resistance in the circuit somewhere. Unplug any connectors in the circuit and check that they are clean and not full of chaff and maybe a little corroded. That will definitely cause problems. And finally check that a fan belt idler bearing or fan [ or water pump ] bearing is not starting to seize up. Usually this will show up with a belt that is rather sad and getting sadder quick! If it is cummins powered, judging from our experience, there are that many fan belt sizes that I think AGCO had a separate belt for every individual Gleaner built. Blow any heavy dust and etc off the backside of those indicator lights as well. I think that sometime in the ages past, [ l2 days! ] we have experienced some current leakage across between the various indicator lights. Enjoy!