Module location for blower motor on a 1994 Buick Roadmaster with automatic climate control.

Could be ! could also be the blower motor is bad or blower motor control module .
Does you buick have manual or automatic climate control ? There is a fuse box under the rear seat ,that is where fuse is for blower motor .HVAC BLWR fuse 40 amp. Chevy Trailblazer EXT Blower Motor Won Turn Off

Automatic or manual climate control ?

• The blower motor does not operate correctly - manual climate control

• Circuitry short
• A/C blower motor resistor
• A/C blower motor switch
• Blower motor high speed relay

• Go To Pinpoint Test O .

• The blower motor does not operate correctly - EATC

• Circuitry short/open
• A/C blower motor speed control
• EATC module

• Go To Pinpoint Test Q .

Pinpoint Test Q: The Blower Motor Does Not Operate Correctly - EATC
Normal Operation Under normal operation, the blower motor control module receives a 1-2 volt signal from the EATC module through circuit CH218 (GN/VT) to determine the desired blower motor speed. The EATC module receives a feedback voltage from the blower motor control module through circuit VH219 (GY) to determine actual blower motor speed. When the highest blower motor setting is selected, the EATC module sends 12 volts to the blower control module through circuit CH217 (BN).

Possible Causes
• An open, short to voltage, ground or together in circuits CH218 (GN/VT), VH219 (GY) or circuit CH217 (BN)
• Blower motor control module
• EATC module
• If automatic HVAC system i would suspect Blower motor control module .

I should think that you tested the battery voltage with a multi meter and you would expect 12.6 volts . However if you test a battery use a load tester that simulates the battery under load as from a starter and you would find that the 12.6 volts drops to the red zone . have a load test done on the battery and you will probably find a faulty cell

Yes, depending on if you have manual controls (Blower Motor Resistor) or automatic climate control ( Blower Motor Control Module), basically looks the same. Located on bottom of fan motor behind the glovebox. Need to remove plastic kick guard on bottom and look up. It's right there attached at bottom with 2 small screws. Must drop the glovebox door also, just release it down to get to the connectors into the blower itself.

What kind of module? What are you trying to do?

Automatic climate control? The HVAC control module is the part with the buttons that control the heater in the dash.

The first thing I would do is access the blower motor. With key on and/or the engine running wiggle the connector at the blower motor. It you get the same symptom than replace the blower motor. I run into quite a few of these with this symptom.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

there is a module that controls the motor located arend the blower moter that will need to be replaced. Not sure if this is available other than dealer. check with auto parts stores first. I would ask for blower motor control module.If this helps please reply and good luck

The heater core may be stopped up. Try to back flush it with a water hose.

Replace your blower motor relay. It's located under the hood on the firewall passenger side.

It's a 1995 Buick Roadmaster. I believe it's the blower motor control module. I think it's under the passenger side dash and if I can get it out, how can I get it tested?