Can someone tell me where the switch is for the radiator fan on a 1991 RS with a 305? Is actuated by completing to ground? Fan stays on as soon as key is turned on. I checked the relay and it's fine.

 

Let's try the easy fix first. Looking at your heater/AC controls in the dash, if you have your upper slider in any of the three "Air Cond" positions, the radiator fan will run as soon as you turn the key on. The fan is designed to go on as soon as AC is selected. Was that the "problem"?

 

[&:] in most cases the a/c is also designed to run in the defrost mode and this should also kick on the fans kurt