99 7.3 - Ford Powerstroke Diesel Forum
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Old 03-13-2013, 08:16 PM
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99 7.3

I have a 99 f450 that when i turn key on i am getting a buzzing noise from what sounds like to be under the dash. today when i turned the key on it acted like i wouldnt getting full current to everything and it wouldnt start i turned the key off and then back on and it started up fine. I just put a new IDM in the truck and I dont want to damage it. the noise was there before i installede the new IDM. would the switch down on the column make that noise
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Old 03-14-2013, 03:16 AM
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A relay will make a buzzing sound when it's only getting around 9 VDC. If I had to put money on it I would bet you have a bad or corroded batter cable. And most likely one on the starter.
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Old 03-14-2013, 09:12 AM
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yup every time mine does that, i had to replace the batteries
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Old 03-14-2013, 05:27 PM
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i will check the battery cables the batteries are only a few months old


Quote:
Originally Posted by mxfever090 View Post
A relay will make a buzzing sound when it's only getting around 9 VDC. If I had to put money on it I would bet you have a bad or corroded batter cable. And most likely one on the starter.
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