Has anyone been able to source one? The owner's manual says, "Contact an Authorized Mazda Dealer for fuse Replacement.". The service advisor at the dealer said that Mazda is not putting fuse diagrams into the CX-90's and that they are not "authorized" to provide them to the customers out of the service manual. They said that if a fuse went out and then I would need to bring the car in for diagnostics and service. Seems crazy that I would have to book an appt at the dealer if a fuse goes out on an interior light, USB C accessory port, rear ac inverter, or any number of normal fuse-related glitches that could happen.

I told them that I am trying to install a dashcam and they said that they would not "authorize" it to be hardwired and that I would have to plug it into the accessory port (cigarette lighter) or one of the USB C plugs.

Any thoughts?

I'd like to know that as well. I will install a radar detector and have hard wired it in other cars. I don't understand Mazda requiring a dealer visit to change something as simple as a fuse. Even my new C8 corvette has a fuse diagram in the manual. I guess it just goes along with no remote start on the key FOB. Remote starts on key fobs have been available for nearly 20 years. CX-90S will be my first Mazda ever. I just have to get used to the strange Mazda quirks.

 

I'm also interested in obtaining a fuse box diagram. I want to make sure I tap in to a proper non-critical fuse to hardwire my dash cam. I reached out to my service contact at the dealership for help with this. I’ll let you know when they respond.

 

me too

 

I got feedback from Mazda Canada. In my opinion, there is no logical reason to omit the fuse box diagram unless they plan on enabling features in the future they don’t want to be revealed right now. Fuse replacement isn’t rocket science.

“Upon speaking with my technical advisor about your inquiry, it was determined that due to the newer electronic components in the new CX-90 vehicles, and the intricacy of these components, Mazda Corporation has decided to omit the fuse panel diagram from the owner's manual to avoid any possible issues/damages if a customer were to replace the fuses themselves; which is why the book states to visit your local Mazda dealership for fuse replacement or assistance.”

 

They just got a reply from me on that feedback. The whole “you’re gonna break something” excuse is something I thought I’d never hear from Mazda. Unacceptable.

 

Here you go, happy "you're going to break something" ening
Post some install photos for the rest of us
I installed 2 fuse taps in the fuse panel near the dead pedal for my dash cam. One for the ignition off recording and one switched power.

 

yeah, i going to install my radar detector to one of the switched circuits. Thx for the diagrams Cambone. Great help.

 

Glad they are helpful, I was very surprised that the diagrams aren't available to the owner via the manual or from the dealer...
FWIW, i got those diagrams from Welcome to Mazda Service Info
Its available to anyone and cost $30 for 24hrs and is probably not meant to be shared but o well.

 

Wow. I’m not gonna ask how you got this. Coming through in the clutch! 👍🏾 The diagram confirms I hit the right switched and always hot fuse slots for my hardwire kit. I’ll take some photos and post by the weekend.

photos please. I'm looking to hardwire my dash cam and would love to know which fuses to use for power and acc if possible! Thanks

 

Anyone know if any of the empty fuse ports can actually be used (i.e. are they pre-wired?)

 

I wired mine by using F5 for switched power (ACC), F6 for always hot power. My dash cam has parking mode and requires both in order to function.

Many thanks to AceNinja (from another forum) for providing me with the fuse information, even before the fuse box diagram was published.

 

Thank you for this. Glad to know F6 is live. In your case, was the hot/powered pin for these two fuse sockets on the right or the left? I'm hoping on the left, as I understand that would mean orienting the fuse tap in a direction with more space to play with.

 

Not sure if we’re allowed to cross-post between forums but this was extremely helpful for my understanding of which fuse slots were hot and which were not, including which ones are for ACC vs always hot. Hope I linked to the specific post in the thread but you’ll be able to find it in the thread if it dumps you into the top of the conversation.

What have you done to your CX-90 today?

 

Thanks, I saw lots of screws that look to be screwed on plastic. I will look for the one hanging down and test it. Trying to tap for both radar and dashcam. I need switched, so F5 it is. Thanks for your info.

 

For those that installed a dash cam, how do you pop off the a-pillar to route the cable? Is it as simple as pulling it off?

I plan on installing a dash cam battery pack and a hardwire kit, but need to figure out which fuses to use for acc power.

 

For those that installed a dash cam, how do you pop off the a-pillar to route the cable? Is it as simple as pulling it off?

I plan on installing a dash cam battery pack and a hardwire kit, but need to figure out which fuses to use for acc power.

I didn't pop off the a-pillar, I just ran the wire between the grooves of the side and top of the pillar and in headliner gap. For the fuses, F5 is switched (acc) and F6 is always on. There are others shown on the pdf's on this thread, but these are what I used.

 

Thanks for all the info. Hoping we can get our dash cam installed now 😊

 

I was able to hardwire a Vantrue n4 pro to a 2024 CX-90 to the fuse by the dead pedal, however the fusebox cover does not fit back on anymore. The hardwire kit is off Amazon, I tapped into ACC and Battery. I am noticing there is not much space in the fusebox area by the dead pedal so once the two connectors are plugged in, they are obstructing the cover from fully snapping into place again. Any ideas or suggestions on how to get the fuse cover to go back on?

 

My hardwire kit for my VIOFO 229 uses right angle fuse taps. Gives me just enough room to close the fuse panel door. Not sure what options you have available to you, other than finding a hardwire kit that also uses right angle taps.

 

Mind sending me a pic of those right angle fuse taps look like? Or maybe a link to those fuse taps?

 

can someone please help me locate the fuse for the trunk's cigarette lighter port?
I think i have managed to blow it; and i see multiple fuses in the above attached diagrams that are for accessory port

 

Ok, figured it out, it's in the box right next to the battery under the hood, F15

 

I made an account just to reply to this. I tend to look at the owner's manual, as part of my pre-buy investigation/checks.

This? It's not a little thing to me. It's the attitude exhibited. I've never owned a Mazda, and with something like this have no intention of buying. Not now, not ever.