[macky456]

The other day i got in my car and went to turn it on, everything turned on except the car itself. 2 hours later i got in the car and nothing turned on this time. So something over time was killing the battery, but NOTHING was on.

I called AAA to give me a jump. The car started with no issues.
Now i am having some big issues with electronics. Some of the cars electronics work, some cig adapters, power windows, headlights, taillights, etc.

The cabin lights dont work, the radio doesnt turn on, the AC blows but not cold air.
Its a 50/50 if something works. I checked the cabin fuse box and all look ok. Then i checked engine fuse box and noticed some fuses blown. I replaced most of the fuses but i am still having the issues. The mazda owners manual says to not touch the main fuses, nor do i know how to get them out.

Can anyone help me here?

 

[wingzero_]

Did you install any lights, or speakers, or stereo, or anything electronic recently?

 

[macky456]

nope, nothing has changed. My main concern is, how do i get everything working again.
Would it be a main fuse that is blown or something?

I have 42k on my car, so warranty is not valid

 

[wingzero_]

Almost sounds like there is a wire somewhere that is leeching power, like touching a panel or something. Stuff like that is hard to diagnose. You may have to take it to someone that specializes in electric systems. If it were a fuse, then it wouldn't work period until the fuse was replaced.

 

[3i2011]

Electrical issues blow. Do what wing said and take it to a specialist. That's really the only way to fix it. Stealership will charge you out the a$$.

 

[wingzero_]

A coworker had a car that was having issues, the dealer told him it was the ECU. I said take it to a place in my city that specializes in electronics, turns out it was a silly problem with the wiring of his dome light.

 

[forresj]

You didn't say how old the car is. If it's a really old car, then it's probably not worth fixing since it will cost more to diagnose, fix or replace. Electrical problems are extremely difficult and expensive to fix.

Electrical contacts will attract dirt and create a small electrical circuit. With really old cars, electrical components will put out filaments and cause small short circuits. There's no real remedy to avoid it.

This website explains why electric board fails: Failure modes of electronics - Wikipedia, the free encyclopedia

 

[wingzero_]

Considering he mentioned a mazda service manual, it is safe to assume it's his 3 and not an old car.

 

[Toyotech]

aaa may have jumped the car backwards blowing a bunch of fuses.

 

[macky]

for some reason my other account isnt working

Yeah its the 2010 mazda 3

After speaking to a few people it sounds like the jump was done wrong and the positive and negative were switched

So know that i am pretty sure thats what happened. I looked at most of the fuses, and only some fuses in the engine compartment are blown. I wasn't sure if its ok to mess with the big fuses or take it somewhere.

Every time i turn the car off, everything resets. The clock, trip, averages, etc.

 

[MyMazda502]

Im not that knowledgeable on electronics but there is another fuse box in the front bumper that houses at least the fog light relays. so you might have to check there also.

 

[DuoofDeath1]

Well that sounds like the Room fuse is blown. When i first got my car, they either have to add or remove something called a Room fuse so that you will get constant power to those things. My clock, radio and trip would reset and i would not have a dome light and my locks wouldn't lock from the remote.

 

[macky]

Well that sounds like the Room fuse is blown. When i first got my car, they either have to add or remove something called a Room fuse so that you will get constant power to those things. My clock, radio and trip would reset and i would not have a dome light and my locks wouldn't lock from the remote.

thats is exactly what my issue is. Where is the room fuse located?

I checked the cabin fuse box and there are none that are blown.

 

[dawhoo]

I think the room fuse is a 15A under the hood.

 

[macky]

Yeah so i went and checked and the is the one i have been having issues with.

That fuse will always blow. I tried 5 new fuses and every single one blew soon as i put it in. Same with the negative being off the battery

Somethings must be shorting it?

 

[ladymav11]

Yeah so i went and checked and the is the one i have been having issues with.

That fuse will always blow. I tried 5 new fuses and every single one blew soon as i put it in. Same with the negative being off the battery

Somethings must be shorting it?

So did you ever get this fixed? I'm having the same issue with my 2012 mazda 3 and am trying to find a solution so I won't have to spend a lot of money taking it somewhere to get fixed.

Help!

 

[Momazda]

So did you ever get this fixed? I'm having the same issue with my 2012 mazda 3 and am trying to find a solution so I won't have to spend a lot of money taking it somewhere to get fixed.

Help!

I’m having the same issue with my 2015 mazda3 . Any help !

 

[Awe]

2007 Mazda 3 checking in with a similar issue and recent fix. Battery was dying, only thing that was noticed was the door open light was staying on even with all doors closed. Found that the door open light would turn off when trunk was open and come on when closed so checked trunk wiring. Found a melted and burnt wiring harness in the trunk. So yeah, electrical issues are annoying

 

[Deborah Smith]

Almost sounds like there is a wire somewhere that is leeching power, like touching a panel or something. Stuff like that is hard to diagnose. You may have to take it to someone that specializes in electric systems. If it were a fuse, then it wouldn't work period until the fuse was replaced.

My radio only flashes on very seldom for a few seconds
In April 9 2020. Took 2013 M3 to Dealer for Bose Lower Booster replacement
However
Dealer says it is electrical problem that they DON'T KNOW HOW TO REPAIR

 

[Deborah Smith]

Oh and 78k miles