It's more likely that the switch fell apart than a relay went bad. Pop the panel out and push on the switch housing to make sure it's still together. Mine "unsnaps" all the time... not by much but just enough that the switch doesn't make electrical contact.
If that's not it, you're going to need a DMM or a low-voltage test light to trouble-shoot.
We should add an electrical section to the forum so we can keep track of things like this.
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2006 CRD
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