remove individual pins from multiplugs on fuse/relay board ?

Hi folks,
Another electrics problem.
Fuel pump not running - traced to no power coming out on the cable on back on relay board.

It looks like I have some corrosion on the pins.
 I need to remove & clean the individual pins from the multiplug.

Should they come out the "front", i.e. push through from the cabel entry side ?

is there a knack to getting them out ?

or, is there some way to clean the inside of the round sockets that I'm missing ?
 
Can I buy new pins somewhere & recrimp/solder them & put back into the multiplugs ?

I ran a temporary jumper cable with 2 female spades, just to get it running !

Thanks for any pointers.
Cheers,
Declan

Most connector pins are inserted from the rear. You should be able to see the locking device from the front. It's usually a tab sticking out sideways/backwards that needs to be pushed back into the side of the crimp pin to allow it back out of the hole. Push the crimp into the connector body whilst you bend the tab.