'98 Cherokee Sport 2 door.

Aux fan was slow to come on, then very slowly with hand assistance, then quit working completely. thought it was the fan. Bought and install salvaged fan, but not fan either.

Fan inop on neither AC nor overtemp.

Thought for sure it was the relay "on right fender well"...replaced but still inop.

Won't come on if overheated or with AC on??? Fan is good.

Help! Help! Help!