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
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.
O.T.F.D. Volunteer 19
Great White - 2003 7.3l F-250 4x4 CCSB -102,000 miles and tickin
DIY intake - 4" Straight pipe - HPX - CAT ELC - 203° t stat - billet t stat housing - coolant filter - dual alt radiator hose - 12V Air compressor - 5 gallon air tank - Air line quick connects - AIR HORNS!