[TR] Soldered Wire Connections in Cars

[Brian.L.Jones at gsk.com]

I have previously read of this caution, regarding soldered wire 
connections in cars, as Paul reported:


>  My soldering is very bad plus I've been told that wiring in  cars ought 
not be
>  soldered.  Soldering does not allow minute vibrations of the connection 
thus
>  yielding broken wires. 

Is this urban myth, or is there truth to it?

I was a keen touring motorcyclist and added a great deal of electrical 
componentry to my motorcycle via an Autocom control system to 'manage' to 
in-helmet speakers with each of CB, Cellphone, Music/Radio, Radar 
detector, and GPS. The protocol for joining wires among the motorcycle 
groups I knew (online and in-person) was to solder and protect with 
heat-shrink wrapping around the joint. My memory of riding tells me that 
motorcycles are subject to more vibration than cars (a wider range and 
greater intensity). I don't recall a well-soldered joint in wiring failing 
on my motorcycle.

Having been 'up close and personal' with my car's voltage control box 
recently, I noted there were several soldered joints in that unit. They 
should vibrate more than a loosely held wire.

Brian