When cranking to start fuse 27 blows

2003 GMC SAVANA
297,000 MILES
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JBGOOD
  • MEMBER
  • 1 POST
When the key goes into start position starter turns for one second then stops due to #27 crank fuse blown . Replaced starter and also park neutral switch.
Apr 5, 2020 at 5:18 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

There is a smaller wire to the starter (s terminal) that only receives power when the key is in the start position. I think the wire on this vehicle is purple. Most likely there is a short to ground between the relay and starter via that wire. Check to see if there is anything on that wire that appears it could be shorting.

Here are a few links that you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if you notice anything.

Joe
Apr 5, 2020 at 5:29 PM
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