mine initially wouldn't open.. from either door. now you mention it, i did check the child lock, and it seemed sus also.. but i think it was possibly unrelated to the issue. (found it today, partly fixed)
I think the CAUSE is possibly from pressing the lock button (has to be with the remote or central locking) while the door handle is trying to open .THIS ISSUE is due to the outer door handle rod puller sticking in the open position.. (I'm uploading pics for a detailed post now)  
if it doesn't lock, check back soon on My next post. It could be the outer handle sticking. .
this is the drivers side rear, but it would easily be possible on the rear doors (front door handles are a different actuation )

 

Left Rear? Mine did that yrs ago... still doesn't lock 🤣

Had that happen in the rangie but the door wouldn't open. Actuator had shat itself and basically stuck the child lock halfway between open and closed. I had to dismantle (destroy) the mechanism from inside the closed door after getting the trim off. They're essentially a ford part as well.    

you'd have to look around and see what you can find.  try the facebook groups etc for bargains (a mate bought a full BTR transmission from the wreckers with sender unit in it for $165 or something like that. ) 

$150 for a used transducer seems excessive. Are there no new ones available??    

had an issue with the AU today,  rear door wouldn't unlock, or open..  then later when i was cycling the locks with the lock/unlock button it unlocked and opened, and now won't close (car can't lock either now)

guessing i'll be pulling an actuator apart tomorrow . (i have spares, so should be able to fix it in the same way this guy did)    

The black 8 pulse one (XD XE) is the rare one

The red one is same even on AUs  (XF XG XH EA EB ED EF EL AU will all be same)    just need to change the gear on the end to suit the EB ratio, the corrector shouldn't be needed.  (unless it was in an XD XE, because the red 10 pulse one will read 20% higher with the same gear on it)

should be easy to find locally in wreckers, 
but what often happens to them is one or more wires snaps off at the transducer end, could try soldering it on again if there's enough left on it. 

here's ONE of 3 on ebay, $150.. seems dear, but ebay is convenient and maybe cheaper if you can find one from someone wrecking one of the above cars    https://www.ebay.com.au/itm/298141705342?_skw=speedo+transducer+XF&itmmeta=01KW1MTJT1SWPM4PHT849G9WFN&hash=item456aa1647e:g:UXwAAeSwkQVpvHqb&itmprp=enc%3AAQALAAAA0GfYFPkwiKCW4ZNSs2u11xCvVWbQijWydBZSB2KR5PfHa3bSEY4Bho3eG9%2FFPKLJDwOZUqAQIlAb2qHdUKtDWH%2FzMkXR73YKkGS4ig94FRBCqWR2yg5OdIDiVeJzFIkKOtG%2BsdKBrKY2zF7z%2BhDgINECUJqJ6ywHooklZXvu2hZf7d1P6NfC6VO54xj130AnMxAZGe2ybcKDT1e%2BiZ7YP5tGpTpjisVQ44M%2FWWRq7BAxRkAVs23GlQmVd8BMtpkUlc7hU4n9MGXsyteo%2BEbT99I%3D|tkp%3ABk9SR6Ct6rTgZw

it wont clip off like modern cars if it's like the base model XD XE XF seats.  you need to unskin the seat trim and then there are two clips that are extremely strong and brittle  that you need to prise up a bit so the headrest can slide out (if you release those clips, it will slide out like a modern car one, but it's release clips are inside the seat back under the foam)

you might be able to just take the head rest cover off.. that's probably the best way for a beginner.  have lots of swear words ready,  and ideally a location of a spare seat. 

Hi,   I have my car at club members house trying to get a few things sorted.  It seem like the transducer on my single rail is dead and from what I have found so far the replacement part is rarer the rocking horse shit.  I forgot to write down the part number but it is a red sheathed transducer.  I'm lead to believing that it is a Bosch F005S00070 10 pulse transducer.  Has anyone found a new replacement item that supersedes the F005S00070??  I had a speedo corrector wired in as the car has a EB diff.  I bought the car that way.

This is the item fitted.


Any help would be much appreciated.     

Thanks Dean, This gives me a little confidence to tackle it.. There must be a way the headrest clips off, I'll dig deeper this weekend after there steam cleaned.