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No Start

rzman13rzman13 Member Posts: 1
edited May 2023 in Buick
Car died while driving it. So.. in an effort to try and start the car, we did a little testing. Battery is good. Had it charged and tested under a load. It seems we have a problem with the front compartment fuse block fuse plate. Using a multimeter, I get 12.37v everywhere on the block fuse plate until I touch the starter cable connection and I get nothing.

Video link:
https://drive.google.com/file/d/1DpkZBWecnzhdujZFJFuY_JS5pVTOBpnc/view?usp=share_link

Could this be the issue? Should I try and swap that out? Also, the ignition fuse looked burnt so I replaced that. After that, we now get a click at the 300 amp relay between the positive battery jumper post and the starter cable post but still no start. I also get a weird prompt on my dash display saying to open and close the drivers and passenger windows. We also hear a weird humming sound after I try to start the car which sounds like it's coming from under the alternator and we have no idea what that is. With no power going to the starter, we're thinking that the front compartment fuse block fuse plate is bad and the 300 amp relay between the positive battery post and the starter cable post is not working properly. Thoughts?
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