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The touchscreen cars vs the non are completely different under the hood. The earlier cars routed around the front of the car low by the frame. The later cars had the engine wiring over the top from the firewall to behind the power steering pump. The later cars would seemingly have a more direct path, and it is, but every one of the late front engine (crank and cam sensor) harnesses has had areas inside the loom where the wire insulation was crispy and missing. Thirty five + years has taken a toll.

Replacing the connector and splicing in a good length of new wire as you’ve done is what solved a persistent EO42 issue on my’88. The connector that was replaced appeared fine and I suspected a bad wire as it was routed so close to the lower radiator hose. Lots of electrical tape and re routing the wire away from the hose seems to have done the trick. FYI, I left the pad in place and only tightened it until it felt seated and secured.