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I did the parking lot test with my SUV with electric steering out of curiosity.
Rolling along at higher speeds, still steered pretty easy. As it came near to a slow crawl, very hard to steer. Stopped, pretty much very very hard to turn. Felt pretty much the same as a hyd system, w/ no assist.
But that only assumes one failure mode, loss of power asssit. With a complex system, possibly umpteen different failure modes possible.
If they think it was a connector issue, I'd ask if they checked the individual pins - male and female for tightness. Dielectric grease is one thing, and smart to do to keep the connection clean... but is a bandaid if the actual problem was looseness. You do what is called a drag test with individual known good pins from a wiring repair kit. You push in new individual pins into the car's connector ends, and the "drag" should feel like a tight fitting pin. A loose one will feel obviously loose. A 4 or 8 or 12.... pin connector might snap together nicely, and look real clean. But one loose pin can be the bugger, and only one way to find it. If it was a good electrical technician doing the work, probably did it.... it's a basic pin drag test they would be doing all the time with intermittent electrical problems at connectors. Service manual directs you to do that to at each connector for an intermittent problem... clean, pin drag, dielectric grease... check the circuit continuity, and ground... then that's a full check and verifying of that circuit and connections. If the circuit wiring, connections, grounds check good, then you look at the component testing.
Good luck, hope all is well.
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