Just a word on soldering in general. Plumbing solder flux or paste as it is sometimes called is acid based. Electronic / electrical solder usually has a rosin flux core that acts as the cleaning agent for the bond and it is non corrosive. If you have to use any plumbing flux always be sure to clean the part well in the area of the solder repair to remove all traces of the acid flux. If you don't the acid will slowly attack the surface over a period of time. This is particularly unwanted in your cars electrical system.
Ever look at household copper water pipe connections and wonder what the green corrosion is caused from at elbows, etc? The joint wasn't washed off with a wet rag after it cooled and the flux is still working.
