Blower motor wont run - 1994 Cadillac Eldorado

If you have a variable speed blower motor, a bad motor speed controller can keep it running even with the key out of the ignition. See this post on blower motor controllers. https://ricksfreeautorepairadvice.com/blower-motor-wont-shut-off/

It's just the blower motor control processor , it's not the A/C . Unless the compressor clutch is engaged an the engine is running . Chevy Trailblazer EXT Blower Motor Won Turn Off

Check connector at the blower motor. The ground burns up in the connector. Also try this turn the blower motor on speed 3 then smack the bottom of the blower motor. If it starts blowing the brushes in the motor are worn out. Replace the blower motor.

I had a 2003 caddy dts same issue the blower motor has probably gone bad u can order them online. What u can also try is kicking under the passenger side glove box area that's where the blower is located sometimes they get stuck. Try kicking or tapping under there and see if it pops on. I did this with my car

experience proves that the blower motor is subject to water getting into the motor and burning it out or rusting it up Comes from over filling normally. Remove and inspect the motor.May have to replace the motor

yes a bad resistor will. but also check the blower motor

Being a Plymouth,I would look at the fan switch in the dash,bet it doesn't look ok !!

most blowers are on the front passenger side under dash

I had this problem with my blower on the same vehicle. It was the blower it's self was bad. Cost me $26 to get a new one and now it works better than ever. You should try replacing the blower motor or at least test it be hard wiring it to the battery. If you get a responce from it then the problem lays between the blower and the switch. If you get nothing then replace the blower.
Hope this helps.

Check your blower resister in duct right in from of motor. These tend to burn out and short every once in a while