Blower stays on when car is turned off won't stop running until I disconnect the battery cable, tried the blower fuse that didn't work. 1995 olds auroa

If you pulled the 10 amp fuse in the I/P fuse block and the blower still worked than the the blower motor module is most likely the problem. It is fed by a 30 amp fus4e in the fuse block under the rear seat. That fuse is always hot and always supply power to the blower motor module. If you pull that fuse and the blower stops than it's pretty likely the blower module is the problem.

The blower module is located near the blower motor. It is usually held in place with 2 screws and will have four or five wires at the connector.

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Replace blower motor relay. it is probably in with other relays in fuse box.its under dash on passengers side. its attached to side of blower box. it has a red, purple, black wire and a smaller gray/ black wire. good-luck !!

Sticking blower motor cutout relay

If runs forever(overnight) the electric thermostat for radiator cooling fan is shot