2015 Mustang electric problem? need help asap

[Joemomma22]

try having it put on a load tester

battery should be fine. it starts the car with no problem. should that ground be able to spark? if its going to a computer, it shouldnt be drawing enough current to ark, correct me if im wrong.

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[jbailer]

I really think what Nick said was the biggest help. It sounds like all of those functions you lost are on 1 circuit. Just go in your owners manual and find the fuse. I would definitely check that first if I were you. Yes, one of us could look in our manual and tell you but you could do that yourself. If that doesn't do it, go back to that ground. Multimeters are cheap and great to have. You don't have to be an electrician to use one. Measure the resistance like I posted before.

 

[Joemomma22]

I really think what Nick said was the biggest help. It sounds like all of those functions you lost are on 1 circuit. Just go in your owners manual and find the fuse. I would definitely check that first if I were you. Yes, one of us could look in our manual and tell you but you could do that yourself. If that doesn't do it, go back to that ground. Multimeters are cheap and great to have. You don't have to be an electrician to use one. Measure the resistance like I posted before.

will be checking fuses now. brother on his way with meter. and yes i am aware of how to use one and that theyre cheap and great to have. i've been surrounded by electricians my whole life so somehow or another i've never had one because i've never needed one.

 

[Joemomma22]

Honesty the owners manual isn't too helpful. I have labels for power steering and that's it out of the problems I have (hill start, traction control, advance trac, power steering) and that fuse is fine.

 

[nicktechla]

Honesty the owners manual isn't too helpful. I have labels for power steering and that's it out of the problems I have (hill start, traction control, advance trac, power steering) and that fuse is fine.

check the BCM fuses too. I think there are two

 

[Joemomma22]

check the BCM fuses too. I think there are two

All fuses are fine :(

 

[nicktechla]

I really think what Nick said was the biggest help. It sounds like all of those functions you lost are on 1 circuit. Just go in your owners manual and find the fuse. I would definitely check that first if I were you. Yes, one of us could look in our manual and tell you but you could do that yourself. If that doesn't do it, go back to that ground. Multimeters are cheap and great to have. You don't have to be an electrician to use one. Measure the resistance like I posted before.

yeah... two odd things

1) that the battery was completely dead. I wonder if there is some kind of short or draw?

2) The ground you had to remove just so happens to be the one controlling all the functions that aren't working.

I'll be curious to see what you end up finding!

 

[Joemomma22]

yeah... two odd things

1) that the battery was completely dead. I wonder if there is some kind of short or draw?

2) The ground you had to remove just so happens to be the one controlling all the functions that aren't working.

I'll be curious to see what you end up finding!

As it turns out the 2 issues are unrelated. No clue why the battery died but it seems to have no issues at the moment. As for all the control units that failed it seems to be that they were all contingent on power steering. The ground the catch can was on wasn't making enough contact. Little sand paper and we have power steering back. Reset battery and then force the wheels to slide a little and traction control comes back. Everything is good now. Thanks to everyone for their help. Merry Christmas!

 

[jbailer]

Well it sounds like it isn't a fuse. When troubleshooting, the first rule to look for is what changed because most problems are inflicted. It was working fine before, not there's an issue. Since the intake itself would have nothing to do with those functions, the next logical thing would be incidental damage in that area and I really think what Nick said was key. Since he happened to have those same symptoms when he broke off that ground that is right there where you're working, that should be the focus.

The other thing to check would be power to those systems but if they aren't on the same circuit (protected by the same fuse), that isn't very likely so I'd move on past that. Next thing is that your battery died, as Nick said, I'd be concerned about a short somewhere but the only thing really involved in the CAI install is the IAT sensor so I'd move past that too thinking probably coincidence with the cold weather or you may have left a light on in the car and not realized it. Plus if you recharged the battery and haven't had any more issue with drain, I think that can be eliminated.

Finally is the ground. Any electrical circuit isn't complete until it has power provided to it and a return path for ground. The fact that you had to remove the ground to install the intake and that same ground caused the exact same problem for Nick would have me focused there. As I mentioned before, the easiest way to check this would be to take an ohm meter and check the resistance between the ground terminal you had to remove to install the intake and the one right beside it. Measure the resistance right on the beginning exposed part of the wire rather than the bolt to ensure you didn't somehow insulate the ground from the body with a washer or bad connection. Sorry it sounds basic but have to check, you definitely hooked the ground back up right? You would have removed that ground from the fender, installed the intake and then put that ground wire back over the bracket of the intake.

 

[jbailer]

As it turns out the 2 issues are unrelated. No clue why the battery died but it seems to have no issues at the moment. As for all the control units that failed it seems to be that they were all contingent on power steering. The ground the catch can was on wasn't making enough contact. Little sand paper and we have power steering back. Reset battery and then force the wheels to slide a little and traction control comes back. Everything is good now. Thanks to everyone for their help. Merry Christmas!

Great to hear, congrats!

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