Central Locking Help

[PacoBelan]

I’ve been trying to trouble shoot my central locking issues on my 91 325 vert.

Recently, when I tried to lock the car, I could hear the relays try and fire - but then stopped- when this happened the passenger door is stuck in the locked position ( can only open if turning the key to unlock and pulling the handle) , but I was able to unlock the driver door.

I checked the fuse on the central locking and appears to be intact but there was a bit of corrosion on the circuit board itself- I replaced it with a used one that was said to have worked (fuse also intact) but I don’t hear the relays firing with the new one plugged in.

Before I throw more money at parts, should I trouble shoot the actuators, micro switch, or trouble shoot the wiring?

I’ve taken the door card off on the passenger side and couldn’t manually get the door to unlock.

Thanks in advance for any advice/help.

[martauto]

Welcome to the zone mate, have a look in the "Wiki" it`s pretty good too.
Oh and pic`s of the car are mandatory as well...................................................................................

Mart.