Shayne
Well-Known Member
- Joined
- Aug 9, 2020
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- Location
- Northern Ontario Canada
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- 2021 MME4x Prem
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- Retired
Think you have it? He notes it is the black box contact (TE 2203997-1) that is the negative contact running HVAC from one lead and DC/DC or AC Charging in reverse on another all on the same connector but 2 50 amp fuses. When you are charging at home or it comes on to maintain the 12v the inverters are not powered. Do you think the pre-charge does not come on in this sequence because no capacitors? Just the positive main by itself shuts? Sequence Neg black box ===> Main positiveIndeed, the HVB feeds the DC/DC. The main is partially on: only the left Main Contactor+ needs to be on, while the right one can be off.
This is the power off maintenance end of it needs to wake up and do it. This is where the 12V can die sitting in a parking lot which have been noted here a number of times. He notes the DC/DC acts like a PC's power supply with a rechargeable 12V cmos battery in his first vid. But you need power to run a power supply which will not happen if the positive contact is stuck open.
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