You could try re seating the connector in the photo. Are there any other switches causing issues ? The 1N914 diodes are notorious for causing issues. There will be a small PCB with these diodes on the transformer panel. If there are any other switches playing up in that row or column - that's where I would start looking.

I reseated the plug. It doesn’t look like this switch is on that panel or in the switch matrix, the schematics don’t show any diode on Tilt Sw (04)