Thanks SwissDI3, still don't have this resolved. Although hoping I'm making progress, on day 2 of battery replacement,
-Trickle charged replacement REMY 12V for a 2-3 hours, probably not for long enough. Although my BMW 1.25A trickle charger had a solid green light, indicating 100% charge
-Installed per standard procedures. Disconnect HV, remove old battery, install, reconnect HV.
-Tons of error messages on dash, would not take charge from EVSE. Car blinked yellow, then flashed red. Car won't go out of park, or start.
-Cleared error messages via BimmerLink, car went dead. No lights, no screens, acted like 12V was dead. I have read this is common
-Plugged EVSE in (replacement 12V still in car). EVSE indicated power going to car, car was dead, no interior lights, no dash. Left EVSE connected for 4hr
-Unplugged EVSE, removed replacement 12V REMY. Put REMY 12V on 1.25A BMW trickle charger (about 3:00PM) for overnight charge.
-11:00AM 12V Replacement REMY charging for aprox 20hrs on trickle, which indicated a flashing green light. Which means at least 80% charge
-3:00PM 12V Replacement Remy still charging, flashing green (means 80%+ charge). Remy has been on trickle for 24hrs
-6:00PM 12V has same state, so let's give it another go with install
-Plugged car into EVSE. Light flashes yellow on i3, does not go red (good sign), stays flashing yellow, won’t go blue.
-Inside vehicle, tons of error messages on dash (no surprise), 1st thing registered 12V with BimmerLink, cleared codes one by one. Re-scan, 3-4 modules with low voltage errors, clear them... repeat, does not clear codes
-Messing with remote, I lock car... I hear click from EVSE, i3 starts flashing BLUE! Could this be it? Car HV SOC 74%
-Let car sit on EVSE for hour, I'm impatient.. Let's take her for a spin!! All appears well on my panda i3.
Appears my 36 hour mission is complete.
What's interesting is the trickle charger (on day 2) is warm, I don't recall any heat coming out of it yesterday when I did no initial charge. Was my trickle charger lying to me? This time the 12V SHOULD be charging. I also read where removing 30A fuses can reboot some systems. I'm going to make sure this repl. battery is fully charged before I do anything. Is it normal to trickle charge for 24+ hours?
Hmmmmmm, all this hassle.. now maybe this is why BMW charges $500-$700 bucks to do a battery! LOL
2015 White REx, loaded Tera, ACC
2018 Tesla P3