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Trailer lights not working

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Looking for some advice on my non functioning trailer lights... I installed the hitch and module about 6 mos ago, all O.E. stuff. No problems until last weekend. No trailer lights. Fuses (checked all 4) look good. Connections look good, no power at plug. Pulled the module tonight and it smelled good. As much of a test as I could give it anyhow.

Any thoughts?

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Still struggling with my lights...I have secured the wiring schematic and am trying to troubleshoot from there. Best price I found was app $300 for a new control unit, but don't really want to just replace until I have confirmed it is the control unit. (PN # 7L0 907 383) Another option I've considered is the std. 3 to 2 wire converter. Much cheaper and all I really use anyways... I was wondering if the Touareg version would work, as it is supposed to be splice free using existing connectors... PN # 118509 for that one. Anyone know if the plugs are common between the cayenne and Touareg?

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