Quote:
Originally Posted by warmapple
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On the back side of the plug you may be able to see a bit of silver. This is the solder where the wire has broken again.
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There's the problem. Unless you know what you are doing & make the joint mechanically sound without solder first, the solder WILL crack with vibration. Solder does not handle vibration if it is the only thing holding the wires together.
I have soldered plenty of stuff on cars & bikes & never had a problem, but if you just tack them together, you are asking for trouble. They don't care because it isn't their trouble.