I believe the antenna booster is 12 volt, as is your ceiling lights. That being the case, somewhere, you have a bad connection in the 12 volt circuit that feeds the lights and the signal booster. It could be a loose connection in the fuse panel, or elsewhere in the circuit.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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