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I'm glad I stumbled onto this thread. My battery needed replacing and I was going to just slap a new one in there like I do with everything else I own
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Look up a Doc 414-00 on AGM Battery maintenance.
Quickly see its no longer a slap in action, but the high tech specs involved in these advanced systems.
Good luck.
BM Reset Procedure:Procedure must be carried out within 10 seconds:
1. Switch ignition on (don't start)
2. Pull and release high beam 5 times
3. Press and release brake pedal 3 times
4. If successful the battery light will flash 3 times within the next 15 seconds
5. BMS reset completed
I did exactly this when my daughter returned from deployment the last time. I reconnected the battery and used this procedure. Don't really know if I needed to but it seemed appropriate.