why does the wipers start when the engine is turned on
UMMMMMM, because they are already on ? Is the switch set to automatic?
You may have a short in the switch. Or do you have an automatic turn on when it rains? You may have moister for morning due? Is there moisture on the car? If not, you may have a bad sensor. Also a switch may be bad. Can you turn off the auto sprinklers manually? If so try that. If it still does it, a switch may be the cooperate.
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