2007~2015 Passenger Side Headlight Intermittently Fails

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2013 Mazda CX-9
Over the past two years I’ve had the passenger side headlight fail several times . I have replaced the lightbulbs at least three times and the H11 socket twice because it melted.

Has anyone seen this before or have access to the lighting wiring diagram? Will replacing the lighting relays help? The fact that only the passenger side is affected perplexes me, too.
 
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