beep beep on locking = Bad battery (possiably)!!

[APW]

I thought I’d post this up just in case it helps someone else…. About 10 days ago my 130ps 2018 DCIV L2H1 transit custom (pre-facelift) started doing a double beep sometimes when locking, this normally happens when a door isn’t closed. However, checking when the doors they where all closed and locked and as time went on the issue became more prevalent … Yesterday I went outside to the van and found the battery completely dead. I jumpstarted the van and the battery voltage shot up to 14.4 volts indicating the battery fully charged (the battery was an AGM type), however cranking killed the voltage. I replaced the battery with a new one (it was still the 7yo original Ford factory battery) and haven’t had the locking double beep issue since then....
.... so I’m thinking the locking double beep could be an indicator of a dying battery as a bad battery seems to throw up all sorts of gremlins on these vans.

[Tombollew]

I've noticed mine doing the double beep randomly. Doesn't seem to be any reason, I know it normally indicates a door open or something but I've found it I open and relock it doesn't beep. Seems like a common problem from searching but potentially multiple causes. Good shout on the battery though, glad it's sorted it. I wonder if it's like a sticky actuator or something on the locks and the fresh batt now has the more power to shut it?

[APW]

Update... Its now been a week and no locking Double Beep since the new battery!!

Often random double beep can also be a sign of failing door looms (broken wires & corroded connector pins), or more oftern than not, dirty contacts on the side sliding doors.