Question for everyone who has done this sucessfully. I've had mine on my car for a few thousand miles. When I have it closed (power going to the solenoid) there is a faint electrical hum/noise. Has anyone else experienced this? I have tried 2 different types of wireless relays and it is not the wireless relay. If I supply 12v and ground from the battery directly to the solenoid I still hear the noise. Is this normal?
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