Question about 1991 Cadillac Seville

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1991 seville blower motor wont shut off except by disengaging battery ground.Fuses didnt shut it off,what next?

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REPLACE THE BLOWER CONTROL MODULE. IT IS LOCATED IN THE ENGINE COMPARTMENT AT BACK CLOSE TO WINSHIELD. IT HAS 2 CONNECTORS AND IS UNDER FUSES AND RELAYS PANEL NEAR FIREWALL. IT STICKS DOWN IN BLOWER CASE AND HAS 7MM SCREWS HOLDING IT IN PLACE. GOOD LUCK!

Posted on Sep 07, 2009

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Posted on Jan 02, 2017

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1991 Olds 98 Elite heater blower motor continues to run with key off. Will change speeds with controls but will NOT shut off..


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I've got a 88 seville that the defrost motor won't shut off unless i undo the battery ?


If you mean the main heater blower won't shut off till you pull the battery it's probably the main blower resistor. You should be able to find a connector plug to pull (near the blower) till you can fix it instead of pulling your battery off. After I changed my blower resistor all was fine. It was behind the windshield fluid bottle next to the blower housing on my Safari.
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Dec 10, 2009 | 1988 Cadillac Seville

1 Answer

Blower motor doesn't blow anymore, This blows


If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.

If it works now, it's the control panel. If not, it is the motor.

Blower Motor —Front Removal and Installation
  1. Prepare the vehicle for blower motor (19805) removal.
    1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
    1. Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
  1. Detach the speed control servo.
    1. Disconnect the electrical connector.
    1. Remove the bolt.
    1. Position the speed control servo aside.
  1. Position the coolant expansion tank/windshield washer reservoir aside.
    1. Remove the screws and the nuts.
    1. Position the coolant expansion tank/windshield washer reservoir aside.
  1. Remove the blower motor.
    1. Disconnect the vent hose.
    1. Disconnect the electrical connector.
    1. Remove the four screws.
    1. Remove the blower motor.
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Also,

Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except high.
  • The thermal limiter cannot be reset and is not serviceable.

Aug 10, 2009 | 2001 Ford Explorer Sport

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Ac doesnt work


Check the grounding of the blower motor it's self. Gm had a small issue with the blower motor loosing it's ground. Run a test ground wire from the battery to the blower motor. If this doesn't help, replace motor.

Jul 20, 2009 | Chevrolet S 10 Cars & Trucks

1 Answer

97 caddy cant find fuses or anything that would make blower work


Under the dash... in the duct work for the vents... you will see a coonector that goes to the side of the duct work... and a part held on by two or three screws... that is the resister block... remove it and replace it

Robert

Please rate this solution thanks

Feb 04, 2009 | 1997 Cadillac Seville

1 Answer

Heater not blowing


first check your fuses than check for power and ground at the blower motor plug with the key on and the fan on high. if you have power and ground replace the blower motor. i have replace a few blower motors on these cars they are kinda tough to get out.

Dec 20, 2008 | 1991 Honda Accord

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