Central locking

[South]

is it normal to fix one thing on your car and then randomly the next day a totally unrelated thing just decides to stop working?

only recent work was replacing shock struts

today put key into lock and only drivers door opened. same thing for passenger side, respectively. checked fuses and door switches, no problems.

this really sucks as not only do I not have all the doors unlocking and locking but my trunk and gas cap are permanently locked. The trunk for unknown reasons, just never been able to open with key (sprayed wd40 so hopefully that helps trm). Gas cap due to central locking system.

So any ideas? I've surfed the web and am stuck. I've heard that some wires under drivers seat get rusted out and they might be the cause?

Or is it something in the trunk? and btw how does one open a trunk without a key?