Thank you for posting this, (love the cutting board). I wish I were qualified enough to help you out, and thanks to posts like this maybe someday I will be. Great learning tool to see the schematic and reality. Please update us if you solve your question. More info about your build would be appreciated. Best of luck.
Update time. It appears that I may not need the highvoltage relay. Since lines 25 and 26 to the controller, (contactor in and return respectfully) come from the contactor. And line 24 (12 volt key switch in) for the controller is also direct, from the ignition switch. So now I just need to know if the TBS prescaler input lines go to A1 or A2 side of the contactor?
I think I might have talked myself through it and now understand why it needs to be on the input side of the contactor. Because, and correct me if I’m wrong, when the car is in charging mode, with the key switch in the off position, the TBS needs to see status of the charging system.
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