Cleaned switches, cleaned grounds, checked all connections - everywhere, checked fuses, replaced fuses anyway, checked continuity, checked connections at relay, checked for signs of moisture, .........you name it , I have checked it.....
Bought that convenience relay yesterday for $50. If this doesn't fix it, I'll consider a small, strategically placed, incendiary device next......
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Andy_M
'98 W140 S320 Black/Black
'06 W164 ML500 AMG White/Grey
'03 Porsche 986 Midnight Blue/Grey