On a long trip earlier this year, I noticed that the temperature gauge
would go up and down based on whether I was moving.  Since I was mostly
moving, it was not a problem, but if I came off the highway and then had
to stop at a traffic light the temperature would start to climb.
Fortunately I was always able to get moving again before the temperature
got too high.

Thinking back, I realized that I never heard the radiator fan come on
during these episodes.  Yet I knew the fan worked because it DID come on
if I switched on the air conditioning.

So finally I checked the fuses and sure enough the radiator fan fuse was
blown.  I have a replacement, but I'd like to verify that something is
not shorted in the circuit.

I exposed the thermo switch on the radiator, and removed the connector.
There is a Red/White, Red/Black, and Red/Blue wire on the connector.
What should I jumper to what to test the fan?

Thanks,

Allan
--
1991 Vanagon GL