Well, That Sure Was No Surprise
Published at 14:52 on 1 May 2018
The culprit for the failing aftermarket back-up camera in my truck was the solderless quick-connectors I used (per the recommendation of the camera manufacturer) to wire the camera to power.
This was so much not a surprise that I didn’t even bother to do any troubleshooting to pinpoint the culprit. I simply removed the solderless connectors, cut and stripped the wires in question, twisted them together, soldered them, and taped them.
Then I started my truck and put it into reverse. Bam! Fixed.
This has been consistent with the (crap) performance of virtually every solderless quick-connector I have tried in the past forty years, which is why I felt so confident attempting this repair without further troubleshooting. For some reason, I was willing to give them a try again when I installed that camera. Lesson learned: never again.
A soldered connection firmly and securely bonds two connectors together at the atomic level. Assuming copper wires, the molten solder actually partially dissolves the surface of the copper conductors before it solidifies, resulting in one seamless conductor (transitioning from copper to solder back to copper) that is virtually immune from oxidation or vibration induced failure. Nothing else even remotely comes close to this reliability, except a seamless connector with no splices whatsoever.
I am convinced that the only reason quick-connectors exist is: a) manufacturers who want to cut corners on their assembly lines in order to pad their profits, or b) people, usually do-it-yourselfers, who don’t know how do solder and who are unwilling to learn how.