I seem to be having the same issue. Everything seems to be working fine and if I jumper the two wires going to the temp switch in the thermo housing the clutch kicks in and starts working. I just replaced the thermo and switch and am guessing that maybe the previous switch as bad as well as the relay? You know, so now that the switch is working, the clutch is not because of the relay.
Anyone know where to get these? I have searched but come up empty. Or is a dealer item.
BTW, There are three relays on the right-hand side of the blower motor not sure if these are the ones or not. I took the cover plate off the fuse panel but didn't see anything that might be a different relay.