Rear Running Lights

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trox88

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On my 05 Tahoe, my left rear running light is out but the right is fine. Also, both brake lights work fine. I've changed the bulb to a brand new one from the store without luck. Lastly, I've checked all my fuses and found no issues.
So, in my manual, I have the lighting system wiring diagram with the listed section coming from the 'rear lamps bussing block'. Am I reading this correctly though? I'm seeing the 'left tail/ stop lamp' as my issue light. With that, I'm seeing the brown wire as my probable issue since light blue is listed on both the left and right thus being the shared stop lamp wire.
 

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DRLexpress

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Is your left license plate lite working, it shows sharing power with brown wire at the junction block?
 

Joseph Garcia

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Did you check the bulb socket to see (1) that is clean with contacts exposed and no signs of heat/burning, and (2) do you have 12 volts at the socket contact for the running light filament when your running lights are on?
 

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