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Hi Im David, never seen this before, but ry to disconnect the battery for a few minutes then reconnect it. see if that helps.
is it top post or side post?
its either an 8 mm or 10 mm nut that needs loosened from the negative cable. once loosened then wiggle terminal back and forth until it pulls off.
you'll need to contact the dealer for that.
Hi, my name is***** can help. There is nothing that you could have done while resetting the service light that would cause a no start. I think your battery may have died while you were resetting the light. Try getting the car jump started and see if it will start.
Please let me know how you make out.