There is a test procedure for checking both fans; I'll have to look it up. When I had my first water pump failure on my '98 I tried everything else as I knew that WB/TB was expensive and at the time I had not taught myself how to do it, nor could I afford it.
Anyway from what I remember it goes somethign like this...
Disconnect the wiring harness from the control module (small rectangular box) located underneath on the drivers side, near the radiator drain spout. Use a jumper wire to connect some pins and I do not remember which pins to use; I do remember that if you do it wrong you can burn something out.
The result you want is, if the fan turns on, the fan is good.
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