Marc, you can test your "catch mechs" easilly by isolating them,,, basically dissconnect both the rods,,, & the lock (key barrel),,, & the outer door handle link
you can then slip a screw driver into the plastic tapers slot in the catch mech as tho you`re closing the door (but leave the door open & only "simulate" closing the door by using a screw driver as the hoop) ,,, i call the "hoop" the piece that`s attached to the B-pillar, the thing that the "catch mech hook" catches onto when the door closes
ok,,, now once you "pretend" to close the door (using the screw driver),,, then pull the lever (on the catch mech) that opens the door (the lower one) while applying an outward pressure on the screw driver in the catch mech
if the screwdriver releases & the catch mech hook swings out,,, then your catch mech works for that part of it
now repeat the procedure, but this time when you "pretend" to shut the door (with your screw driver) then need to lock the catch mech by pushing the locking lever in (the top one)
then when you try to pull the door-opening lever (while applying outward pressure on your faitful screwdriver) ,,, the catch "Should-NOT" release,,, if that`s the case then cool,,, the locking part of the catch mech works too
then pull the locking lever back out & test that the door still opens by once again pulling on the door-opening lever
if this is the case then your door ctach mech works completely,,, both opens & closes & locks & unlocks
ok,,, if that is the case with both left & right catch mechs,,,, well your problem is (more than likely) an adjustment issue
if your problem is the key barrel giving you the sH1Ts & swings around all loose & doesn`t seem to lock or un-lock the catch mechs,,,, then it will either be an adjustment thing (unlikely) or the key barrel is either stuffed or maybe the wrong one fitted
sooooooo,,,, the door handle adjustment should be the last thing to set-up,,, you should be able to have the entire package working without even having an inner or outer door handles fitted,,,, then fit them & adjust them
if you`re stuck with all that (& i expect a whole pile of you will be) but they`re really not that difficult to understand when you work out how simple they actually work)
then bring it over & i can dort if all for you easy-peasy
yes they can be a pain,,, but they are mostly a "miss-understood" item rather than busted---> soooooo many people replace handles & catch mechs simply becasue they "Think" they`re broken, when more often than not it`s just an adjustment issue
in saying that--> i do have plenty of left hand catch mechs,,,, but i doubt i have any right hand ones any more
I also have quite a few key barrel assys
but very few good inner or outer handles left