Discussion Starter · #1 ·
Hi guys.. I've followed this site for 4 years now. I love how much information and friendly folks are here, helping one another keep the black sheep running strong. I need help before I pull out my hair.. My john deere 400 bought 4 years ago is having electrical issues. This problem started with a burned up coil once 2 years ago. To now it burns up new coils and solenoids every 3-4 grass mowings. (yard sized 1 acre) I am meticulous with maintenance and try to only buy the best high quality parts.. What it does is seems to overheat the coils, to the point u can't touch them after cutting 1/2 acre. I replaced the voltage regulator, spark plugs, points, condenser, starter solenoid, and many many expensive coils.. And after sitting for a week I went out to cut and fuel pump started up and turned the key to start and slight short sound and nothing.. Has this damaged the starter internals? My battery after sitting for a week it showed 15.1 volts with volt meter.. And slowly checking many times goes to 14.8, 14.3, 14.1, 13.8 ETC…I feel so frustrated.. Like the starters shorting out while I'm sitting there trying to get it to turn over..The JD service manual told me to follow the cranking tests. I tried and everything pointed to a new solenoid.. So I replaced that and now a week later of sitting in the shed. I turned key to on position that engaged the fuel pump. I then let fuel pressure build then turned to crank but won't turn over or do anything. It also makes the fuel pump inoperable even in the key on position when it won't crank anymore also.. Thank you guys for any help or guidance you can send my way to get my beloved 400 back out in the yard mowing again…The only things I have not changed is the key switch because the manual said its getting power to the solenoid so it is good. But key switch, starter, and the stator are the only things that haven't been changed or messed with..Is it possible some knucklehead changed my stator with the wrong sized one causing this mess? Or is it my starter has been shorted out so many times its now constantly like a direct short and until its replaced or rebuilt will continue to burn up the ignition and solenoids? Thank ya'll for any and all your help on this problem… Im terribly sorry this is so long but I wanted to try and show everything and anything it is doing to help with diagnosis.