hi i did a search but could not find what i was looking for.i have had problems with my low speed fan not coming on .is there a way to test a waterpump just to see if its working. will a bad waterpump cause the fan not to work. the reason i ask is because i have already replaced both sensors and the sensor on the bottom of the fan mount.all wires are getting power to them all relays are fine.if i turn the air or heat on both fans run.the car runs on the A or L most of the time when i see it going up i turn on the heat/air.with warm weather coming on fast i must fix this now.so is it the waterpump or did i overlook something. i tried to find the problem before i posted so any help i will be thankfull for.