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Second update :
Let me try to explain what I have just found.
I took a chance and back probed the stalled fan wire with a 12 volt test lamp. There was a brief (three I think.) flash and then a wait of 20 seconds or so and then another brief few flashes...
On the 'running' fan there is a constant impulse flashing controlling the speed of the fan. In fact, when I put the #2 fuse back earlier, the fan ran faster than it is now.
Seems the module/ecu/ whatever, is checking the fan or is faulty, sending only brief 'run' pulses. Seems it runs something like the blower control module does in 126 cars.
So is the fan bad or can/should I fire it up with portable 12 volts ?
dk
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