The ramp guy in Tulsa taught me to tug every wire bundle, not just look at it
Three years ago I was doing a quick turn in Tulsa and the lead pointed at a wire bundle near the APU and said pull on it, so I did and a pin slid right out of the connector. He said he had seen 4 planes go down for stuff that looked fine on a visual. How many of you actually do a tug test on every bundle before you sign off?