When cranking to start fuse 27 blows

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