Quote:
Originally Posted by 59bhp
The reason not to use solder in a system with high vibration is because the solder work hardens and will eventually fail (after becoming hard and brittle),
whether a car comes under the catogory of high vibrations is another matter.
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Vibration does NOT work-harden, unless you're frequently bending the wire enough to pass it's yield point, and if you have it set up so you're doing that you really suck at wiring. Passing to the engine, or passing through doors, are the only places there should be ANY wear to your harness.
Even so, solder is very ductile, and thus not prone to work harden.
And, the wires are mounted, with some flex, to the body - which would be destroyed long before transferring that much movement to the wires.
Of more concern is the wire that you bent in order to tuck it, and that did NOT get soldered (and thus heated, and annealed, which repairs it's work-hardening).