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I asked the same question. I think what happened was the battery clamp was broke, causing the ECU to read less than 12v (or whatever it's supposed to be, 14?) which caused the alternator to push too much power through the system trying to charge the battery, which then caused the ECU to fry...

I brought it in last week and learned today they checked it and found the ECU was bad. They ordered a new one and am waiting on it now. The mechanic mentioned they put out a new service bulletin last week as well-not sure if he was referring to the old one or if there is a newer one out now. My...

How do I prevent this happening again in the future?

Is it possible to trouble shoot myself and just pop a new or used ecu in? Just brain storming if it isn’t covered by warranty.

Unreal his can happen because a battery post clamp broke. My previous L3400 had the same crappy clamp break, replaced it for a few bucks.

Thank you for the help! It appears people have this issue by simply changing the battery. Is there a different way to change the battery then?

My tractor is a 2016 model year. Any chance this is covered still? I did not buy it new and bought it used as is about six months ago.

Tried to start my L4701 this morning and heard a new buzzing sound behind the dashboard. I turned it off and googled it quick and saw a thread about possible battery issues. I checked the positive battery try clamp and found it was broken. I secured it and now I have a P0605 error code. The...

Anyone running a Woods BH9000 on a l4701? It’s a big backhoe and in my google searching I haven’t found anyone running one on a l4701. It appears people are using them on grand l’s and larger Mx or m tractors. Any input would be great, thanks!