2018 Mustang 5.0 ABS draining battery?

[myjaja]

So I've noticed my battery draining a bit. I decided to start pulling fuses to see what's causing the drain and once I pull fuse #62, the drain goes away and my voltage starts rising up again. Fuse 62 is described as "Anti-lock brakes run-start switch" which is for the traction control. I doubt my powertrain warranty would cover repairs for this. I couldn't find any relays for the ABS. Any ideas what might be causing it stay on when the car is off?

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[myjaja]

Any ideas?

 

[Firsttexan]

Try a youtube search on the subject.

 

[myjaja]

Try a youtube search on the subject.

I did before making this thread. Can't find any information on it on youtube or on google

 

[Call_Me_Bruce]

I suggest a YouTube channel called Pine Hollow Auto Diagnostics. He did a video recently documenting how a late model Lincoln/Ford was draining the battery. It took him a while to diagnose which part was causing the drain. I'm not saying this video is the source of your problem, I'm suggesting that you take a look to see all the steps he went through to figure out the problem. At the very least you'll need a good wiring diagram and a lot of time and patience to diagnose. Electrical gremlins are the worst.

 

[Bikeman315]

So I've noticed my battery draining a bit. I decided to start pulling fuses to see what's causing the drain and once I pull fuse #62, the drain goes away and my voltage starts rising up again. Fuse 62 is described as "Anti-lock brakes run-start switch" which is for the traction control. I doubt my powertrain warranty would cover repairs for this. I couldn't find any relays for the ABS. Any ideas what might be causing it stay on when the car is off?

Although it appears that you may have found an immediate cause it would be best to have a dealer look into this. These systems are complicated (most electronics are) and since there is safety involved best to leave it with the pros.

 

[Mdtaylorjr]

You need to get a power distribution diagram which can be as much as 10 pages long. Find the fuse that kills the draw and see if it powers anymore fuses further down the line. Then you'll have to pull each one of those individually or unplug every component on that fuse one at a time and retest. I hate doing draw test as they can take hours and the customer never wants to pay for the full time it requires.

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