Originally Posted by gtkid2
Ok thank you... my original opel manual has a horrible wiring diagram! so here's a tricky one... there is a thick black wire going to the back of the cigarette lighter... appears to be a power because it has a rubber cover and the other wire is ground. That wire splits, and the split power wire is obviously supposed to go to something... I have a free terminal on the backside of the fan switch and the bulb to the flasher switch. Which one does it go to? thank you!
p.s.
I HATE WIRING 
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the split wire goes to the fan speed control switch if I remember it correctly feel free to correct if wrong info.