Try the other switch, you wont hurt anything by jumping out the switch. I think the temp switch has brown wires.

Larry, i think he is just looking for any more air flow that he can get, dont know if will help or not but it cant hurt. I am assuming that he took the clutch fan off so it wont end up in the radiator. I just did the same thing on my td and am planing a dual 10" electric convertion b4 the weather gets to hot.

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82 Rabbit diesel (first d), 84 Jetta turbo d (300k when sold), 83 240d (305k when sold), 84 F250 6.9d w/Banks turbo(parts truck), 86 F250 6 cyl.gasser(waiting for 6.9d), 84 300d ( 347k Sold 8/04), Y2k New Bettle TDI (185k miles), 95 740IL (wifes), 87 300TD (206k Sold 7/05), 05 Passat TDI Wagon