Sorry, didn't mean to suggest that you replace those components but test them. An ignition switch is a multiple position, multiple throw switch. Just because one circuit is closing doesn't mean they all are.
Just because a relay clicks it doesn't mean it's good... Not at all.
Any of these components may experience intermittent failure.... More often than not heat is a significant contributing factor but it's not an absolute.
MTR? Material Test Report? What does that mean?
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