1 st you measure for power on the connector to the dimmer to see if you have it on both sides. The dimmer has only 2 connections one should measure 12v all the time and the other should measure between 12v and 5v when you turn the dimmer. Sorry about the connector coming apart but I don't have any info at home on the pin config. If you have power only on one side I would say the problem is the dimmer. How long have the lights been out? did it happen after you did something in the car?
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