I have a 2019 F-150 5.0 with 83k Miles. Right around 72k miles I had ford put rear brakes on the truck, about 10 miles down the road from the shop my truck through a warning about the parking brake needing serviced and my parking brake no longer works. After this happened when my truck sits not running, keys not in it, it will prime the fuel pump over and over until the battery dies (about 24 hours). Has anyone experienced this before?

 

Replacing rear brakes needs a specific way to do it because electric actuation is involved.
On the fuel pump running, that's a different issue without the ignition on.
May or may not be part of the brake job by some kind of error.
A note; in wet/snow mode, the system uses ABS to operate the Emg caliper motors for enhanced traction control, so they need to be functionally correct.
Good luck.

 

Seems like the person who 'broke' the truck can fix it more easily than the internet people?

have you spoken to the dealership that did the work? This is brand new, correct -meaning you drove 10 miles yesterday, brakes acted up and today you are asking how to fix this?
Or did the parking brake 3 months ago and today you have a bad battery for priming issues.
Trying to connect the dots to ask if the dealership work caused a problem or if these 2 are related incidents?

 

Why didn't you turn around and go right back to the shop?

 

I dropped the truck off at the dealership to have the work done, I wasn't able to make it back in time before they closed so I told them to just lock the keys in the truck and I picked it up after hours or I would have went back. But yes, I left the dealership drove straight home and within a half mile of getting to my house I got the service brake fault and my parking brake did not work when I parked it. Also my cruise control hasn't worked since the parking brake issue started.

I can't say exactly when the fuel pump priming issue started but I never noticed it before this. Prior to this i let the truck sit for 10 days without any issue. Now, 24 hours and its dead.

 

Also, once the battery gets low, the throttle body will start opening, closing, and clicking very loudly.