electrical buzzing when car is off

2003 GMC SAVANA
250,000 MILES
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03GMCVAN2500
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i walked up to my car that has been sitting for like 5 days, 200k miles. as i walked up to it i heard a buzzing noise coming from inside the hood (i didnt start the car at all yet just walking towards it) i got in and started up and drove fine, but when i turned the car off it still makes the buzzing noise sounds like an electrical buzzin like something is getting power even when car if OFF. i popped hood and its coming from the black fuse Box/ Wire Harness.

decided to discount the Positive terminal on battery as the car will be sitting for a while before i take it to a shop, is that safe and the right thing to do for now?
Jul 12, 2015 at 8:28 PM
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HMAC300
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ya you did ok, when you connect it back see which relay is making the noise may be bad
Jul 13, 2015 at 7:05 AM
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03GMCVAN2500
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okay thanks for the quick reply ! :)
Jul 13, 2015 at 7:20 PM
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