Could it be the bending rods? Have you checked voltage to the sunblind?
Does it stay up nice even though the electricals are broken? I don't have electrical sunblinds, but I'd like to get just sunblinds. I guess I can't fit electrical ones without the slot in the back. Otherwise I'd buy some broken ones and just leave 'em up.
I had a problem with the power to mine. What fixed it was a new ignition switch believe it or not. Have you experienced any other electrical problems, ie, air bag light, radio not working, etc? It could be that.
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