The solder joints should be convex and shiny.
It could be either. Any type of liquid core solder (acid core, rosin core, etc.) is heterogenous, since there's the metal part and the core part. A solid-core solder is probably homogeneous.
The surface of the solder on the connection you are soldering should be bright and shiny. A cold solder joint will not be shiny, it will have a crinkly look about it. In some cases the joint can be wiggled and it will come apart.
There are many places where one can purchase a solder station. One of the best places to purchase a solder station would be a hardware store like Lowes or Home Depot.
2pac died
Looks like somebody is selling cheap solder here; http://detroit.craigslist.org/okl/tls/3755076901.html
there is probably a broken solder joint on the instrument cluster circuit board. if you look at the circuit card itself there will be 2 resistors that look burned. by them there is a solder joint that connects the front and back of the board. check to see what side is not making connection and add solder to it. it takes a couple hours to do, and the solder job doesnt need to be perfect.
with solder
Yes, usually no problem. If you know how to solder, then solder away.
In some solder it is. But even if it is in the solder you should still use flux.
what wires are they? If they are just regular wires like for lights or something, the best method is to solder them back together with rosin core solder and cover them with heat shrink tubing what wires are they? If they are just regular wires like for lights or something, the best method is to solder them back together with rosin core solder and cover them with heat shrink tubing
Flux can be in many different forms. it can be in the solder, it can be in a soft form like butter, or it can be in a pen like a tide stain stick. it is used on the solder iron and on the thing you're soldering to make a good surface for the solder to stick to. Basically it makes soldering easier, it can be done with out it.