[Snarky]

So ummm... while I was installing a new amp and speakers in my 2016 Mazda 6, my husband put my battery back in for me. Only, he put it in backward. One burst of pretty light and a puff of smoke later, I now have a car that won't start and a blown positive battery terminal fuse block. I've already bought the new block, but I'm having trouble getting it installed due to this one bolt. It'll be the one with the blue mark in the picture. I have to take that part off to use on the new fuse block. Anyone have any clue how to get this thing off without killing myself? I don't want to say what I've tried so far. Also, hi! I've been lurking a while and just joined. Nice to meet you

 

[CYANiDE]

What does the back of that terminal block look like? Ratchet with socket in the bolt side and a vice grip on the other end didn’t work?

 

[Snarky]

The back of the bolt has a square piece that almost seems like it's welded to the end of the bolt. It spins. I don't have anything here that can grab and hold that side as far as I know. I'd take a picture, but my husband is trying to manhandle it into submission right now.

 

[Snarky]

But yes, I have tried that and failed. Unless making it spin where it didn't move at all before is not considered a failure.

 

[Snarky]

He drilled hole through the center of it 🤦‍♀️It worked, but now I need to find another nut and bolt to fit it. Oh well... Thank you for your help!

 

[Archerfish]

He drilled hole through the center of it 🤦‍♀️It worked, but now I need to find another nut and bolt to fit it. Oh well... Thank you for your help!

There must be a way to remove it or it is designed that way. I remember that bolt, I can't remove it no matter how I turn it. I concluded that it is not safe to remove it. What I did is, I cut through the metal so that I can insert this "comfort connect" from CTEK battery charger. I just don't know if it's the same bolt.

Perhaps @DrFeelGood has an idea about this particular bolt.

 

[DrFeelGood]

Thanks for the Mention @Archerfish
That bolt had a welded retention ring on the bottom. You can see the split in the ring. I believe it allows it to be fully loosened without falling off.
It might be more feasible to just replace the terminal D07A-67-TB1 and nut (separate part #).

This part is used on the CX-3, CX-5, 2,3,6 so if you had a salvage yard nearby...

A small carriage bolt may work in a pinch and may give you the underside clearance with a little modification.

 

[madza6]

I can't unscrew it either. All the trailer wiring harness videos shows it's removable. So the conclusion is it can't be removed right?

 

[TalonTsi90]

I can't unscrew it either. All the trailer wiring harness videos shows it's removable. So the conclusion is it can't be removed right?

Mine came right off when i had to cut it off for my Anti Gravity install. Might wanna get a small impact like Ryobi makes. I would have ripped the negative ground on the strut tower off without it.

 

[43VR]

Hi Snarky, my fuse also blew. Where did you find a replacement?

 

[TalonTsi90]

Hi Snarky, my fuse also blew. Where did you find a replacement?

What fuse? Theres like, over a 100 in these cars.