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I have been having this issue more and more frequently, when I try and start my Expedition I get a buzzing noise coming from the fuse panel (at the passenger kick panel) I turn the key off and on a few times then the buzzing noise goes away and the vehicle starts. Not sure what this is could it be one of the relay switches going bad?? The Check advtrac message is popping up on the dash display and the advtrac button on the console is off (even if you push the button) We are getting to take a road trip to Iowa and I need my Expy to be in tip top shape. Any help is greatly appreciated.
I changed two relays, pcm and the starter relay, couldn't tell which one was buzzing. They all felt like they were. So I changed the teo that made the most sense. What would cause the advtrac to turn off(besides pushing the button to turn it on and off)
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