 Testing dual radiator fan speeds?
Question. I am wanting to see if my fan will run both the high and low speeds with a manual override. (Checking to see if the fan is operating properly, as I've never heard it run accept when the A/C is on, which I know the HS side will kick on immediatly, and does just fine)
Car year is 1997 318ti/M44 (1/1997 build)
I've disconnected the radiator sensor plug, and can bridge the brown -> Black and get the high-speed setting to kick-in, but, when bridging the other side of the plug to brown.......I get nothing on the low-speed side. (Think it was the green stripe side)
I did this with ignition key on (engine off).
I've also seen a post mentioning that the high-speed relay (magenta in color) if bad could also cause this, where the HS side works but LS does not.
Long-story-short, how can I manually test the low speed fan? | 
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