Quote:
Originally Posted by slob
a soldered copper wire is potentially more brittle and may not survive as well as a properly crimped connector in service
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Expanding a little on what slob says, there will be a tendency for any solder to wick along the wire under the insulation due to capillary action. That part of the wire won't be as flexible as the remainder so any stresses caused by movement in the loom will tend to concentrate where the solder begins, potentially causing a break.
On a separate point, the addition of solder will increase electrical resistance in the connector.
There are, of course, plenty of plusses and minuses for both crimped and soldered connections. I remember reading on the NASA site that they use both crimped or soldered connections, depending on the exact application. I can't imagine a more extreme environment than that in which NASA's equipment operates. I don't recall them saying that solder and crimping being used on the same connection though.