Hatch pops open when locking car

[Jonathanred6]

Woke up to a new issue with my 2017 Fiesta ST. Hatch will close, but pops open when attempting to lock the car. Doesn’t make a difference if I’m locking it from the FOB the door button or inside the car. Also happens when I start driving the car and it auto locks, meaning the hatch is bouncing around and interior lights are on while driving. The other thing I noticed is that every time I try to lock or unlock the doors using the fob the rear window wiper moves two inches each time either button is pressed. Rear wiper is also not working and I hear a relay clicking noise every time I try to activate it.

 

[Capri to ST]

This is probably way off base, but whenever I hear about weird electrical issues I wonder if the person has a weak battery. I have read about all sorts of seemingly unrelated issues being caused by that. I think what happens is that as the battery gets weaker it prioritizes main functions and shuts off or reduces power to less critical functions.If your battery is old and close to needing replacement anyway that might be a good place to start, just to eliminate one possible cause.

 

[Jonathanred6]

This is probably way off base, but whenever I hear about weird electrical issues I wonder if the person has a weak battery. I have read about all sorts of seemingly unrelated issues being caused by that. I think what happens is that if as the battery gets weaker it prioritizes main functions and shuts off or reduces power to less critical functions.If your battery is old and close to needing replacement anyway that might be a good place to start, just to eliminate one possible cause.

That was one of my thoughts this morning. I’ve had weird issues like this with previous cars when the battery starts to die. I’ll get it checked tonight after work.

 

[Capri to ST]

That was one of my thoughts this morning. I’ve had weird issues like this with previous cars when the battery starts to die. I’ll get it checked tonight after work.

Good luck, let us know what happens.

 

[Jonathanred6]

Good luck, let us know what happens.

Got the battery tested and it was fine. Cleaned the terminals while I was at it and that didn't make a difference either. Looks like other people have had some issues with the hatch button shorting out from water leaking through the rear wiper grommet. It has been extra wet here the past week. The only other thing I noticed is a very very slight flicker of the daytime running lights when the engine is running. They dont flicker at all when they turn on from unlocking the car though. Not sure if it was doing that before, it's extremely subtle so I don't think I would have noticed it without carefully looking.

Looks like there have been other reports of this issue and I see some suggestions to replace the lock switch/button