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Dash backlighting issue


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I have an 04 silverado and the other night I lost every bit of backlighting on my dash..The HVAC controls, gauges,4wd buttons, headlight switch. My speedo and everything else work fine otherwise the cluster was replaced a year ago, my headlights still come on like normal,no burnt out bulbs anywhere, checked all the fuses inside and under the hood, replaced the whole headlight switch (I knew the dimmer sometimes goes bad) and still nothing, I've done everything I can think of up to taking the dash apart and tracing wires and wanted to see if anyone else up here had gone through this or knew of anything I'm forgetting to check before I trace all the wires

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There's 9 bulbs for backlighting and they wouldn't all burn at the same time. But it does have a separate ground from the rest of the cluster. Let me find the connector end view pin out for you.

 

2017-01-18%2010.27.33_zpsxieqdfu7.jpg

 

''A11'' is the positive feed and either ''A12 or B12'' is the the ground.

 

Screenshot%202017-02-24%2015.11.49_zpsrp

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