Have noticed recently that when locking the car with the remote, not always do all the door lock. There will be a random one or 2 that stays unlocked.
Example would be working fine, then lock the car and all but the drivers rear locks. Next time, might be both drivers doors. Then might work for a few times and then passenger rear door (example).
If you press the lock button again to deadlock, they lock. If you unlock and try again, they lock fine. Always unlock fine.
You can tell if one has not locked by the sound. When not working properly, you get like a slurping sound, but a resounding clunk when they all work if that makes sense.
Other thing is that the alarm horn was removed years ago but have put another horn on and still makes no noise, just flashes lights. Even tried a proper car horn with no sound, related?
Power Sounder was binned in 2015 so that gone.
Part of me thinks CDL unit? Have not done a Tech 2 yet but suspect will not show anything.
Car has been used almost daily during last year as well so not due to being left parked up either.
Thoughts?