In Reply to: Aux. Fan (Low Speed) help posted by Ray on July 30, 2001 at 12:19:07:
I would have suggested checking the resistors that control the fan speed next. But since you could hear a click when you jumpered it... Wait never mind! The click is part of the control circuit indicating that the relay is good.
Ok, I would now check the following:
1) Resistor pack (see of the low speed resistor is open)
2) The contacts points on the low speed relay. Make sure that when it closes you get continuity on the switch side of the relay.
I think you're almost there.
Hope this helps (sorry for the stream of consience troubleshooting)
Low speed not operating, hi speed ok. Fuses OK! I jumped radiator temperature switch hi speed came on (black/grey to brown). Jumped low speed (violet/grey to brown) low speed wouldn't come on. I could hear relay click but fan did not operate. How do I check further?