Hi, all
Something about Zener diode. I have found that the door lock switch of 
my '98 Hyundai Accent has been damaged by water (sealing issues). I used 
Wurth Contact OL to remove rust but one of the components of the board 
has got broken while I was trying to remove the rests of the product 
with a piece of paper. I believe I can carry out the soldering work but 
I cannot identify the broken component. My searches (according to 
Testing and Distinguishing Zener Diodes Overview, content source: 
https://www.kynix.com/Blog/How-to-Test-and-Distinguish-Zener-Diodes.html) 
lead me to believe it is a zener diode, but what kind? There are no 
markings on it.

I have thought about asking the local shop to give me a selection of the 
most common types and go the trial and error way, but I am afraid I 
could fry other thing... So, could someone guess, by the pictures of the 
board, what kind of component I need to have all the doors of my car 
closed in one move like in the old good times?

Thank you in advance.