Battery, alternator or electrical

2006 GMC YUKON
200,000 MILES • 5.7L • V8 • AWD • AUTOMATIC
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JO BUCKMEIER
  • MEMBER
  • 2 POSTS
Well my electrical went hay wire, then all my gauges went out, no power, so turned off vehicle and it would not restart, no click, no power, nothing. Put in new battery and new alternator, drove around block, lost all electrical again, turn off truck and will not start again and no power, nothing. 40 amp fuse under hood is blown. What is wrong? Checked battery amps, all is good. Help, please.
Aug 16, 2016 at 11:41 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
which fuse? follow wires to where they are connected in diagram then see if there is a short causing it could be ignition switch or a direct short.
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Aug 17, 2016 at 7:32 AM
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JO BUCKMEIER
  • MEMBER
  • 2 POSTS
It is the 40 amp #1 stud fuse. Would that cause no power or crank what so ever?
Aug 17, 2016 at 9:05 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
yes, because yo are not getting power to either ignition switch to work or starter relay. if either one does not get any power it is not going to start.
Aug 17, 2016 at 9:41 AM
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