Well, since we don't know how your braking system was wired for power it makes it difficult to give you useful answers.
Is the braking system powered directly from the MH charge wire? Or does it get its power from the onboard battery and the MH charging line is supposed to keep the onboard battery charged?
400 miles? How many hours? Was there an overnight break and the toad left in ACC?
How old is the toad battery? At best when new it probably only had 75 AH.
So many unknowns.........
And although this forum has a lot of Thor specific knowledge as well as general RV systems knowledge it is probably pretty weak on specific toad knowledge. You may get better answers about your Soul issue from the "Toads and Motorhome Related Towing" section of IRV2.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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