Since I didn’t install mine, I can’t say for sure if the shop trouble shooted anything prior to me arriving.
Did you try resetting the fault codes? I know nothing about that other than having read it somewhere while doing research. If you plugged that bypass out of order it may have caused the dash light to come on and it would need to be reset, whatever that entails.
At least your passenger AB light is off, so you know that bypass is functioning.
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