I'm working on putting new LEDs on the master window switch, but I've run into a problem. On the part labeled 'LED4' I can't get the light to work. I think I might have accidentally broke one of the leads on the circuit board. Did I break something? Any thoughts/ideas, or am I headed for the junkyard to get a new one?

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Looks like you burned the pad...may be fixable depending on how good at soldering you are

 

Long story short: you probably tore off the contact when you removed the SMD. Keep in mind that the 4 contacts are really just a feed back loop and only one contact on one side and one contact on the other is useful when connecting two contact LEDs. Also, when you get aroundto soldering only use the two contacts that work otherwise the feedback loop will render the circuit useless.

As for fixing the problem the best thing to do is to scratch off some of the silicone covering from the conductor patch on the circuit board that connects with the contact you damaged and solder the LED directly to it. If you want I can do the repair work just PM me if you feel like you need the assistance.

 

Ah, I thought so! I think I saw some of the contact come off with that SMD. I'll try the scratch thing tomorrow. Thanks

 

This. Also, nice work on the video, helping us help you FTMFW dude!

There is one other possibility, I see some shmagma on the contacts, that needs to get cleaned off. You might have two contacts touching because there is simply way too much solder, etc there. If that's the case you will have no power. Each contact point must be completely clean. Try that first.

IF that doesn't work then try what Shinjiduo said and scratch this part a bit (lightly until the green part goes away and you have shiny copper to solder to:



Once you have copper, you will need to use flux to get some solder on there without overheating it. Put flux on the exposed copper and 'tin' the area with a bit of solder. Then test it. If it works, re-flux and install the LED. You will need to be careful about clearances and mess with the LED lead length to get things to fit properly due to the irregular contact point.

 

A master's advice. Hope you didn't go overboard with my advice. It is always better to check the simplest solution first.