On the B250 van the blower resistor is located behind the passenger glove box, remove the glove box shell and resistor is located just to the right side, you can't miss it.
The blower motor resistor is located under the hood, in the right hand cowl, behind the windshield washer bottle.............
Not sure about the relay, but there is a blower resistor assembly located on the heater case to the right of the blower motor.
Underneith the Dash.
The blower resistor assembly is located on the heater case to the right of the blower motor. - Haynes Repair Manual #36071, 1993-2005 Ford Ranger Pick-ups
Should be under the hood, on the firewall, passenger side, not far from the blower motor.
The blower motor speed resistor may be burned out. The resistor is available from your local auto parts store.
The blower motor resistor on a 1993 Nissan Altima is behind the glove compartment on the passenger side of the vehicle. To access the blower motor resistor, the glove compartment can be removed by lowering the bottom as much as possible and removing it from the hinges.
The blower motor fuse protects the blower motor electrical circuit. The blower motor relay operates only the high speed function of the blower motor. The blower motor speed resistor operates the lower speed functions of the blower motor.
The blower motor resistor on a 1993 Dodge Dynasty is typically located under the dashboard on the passenger side, near the blower motor itself. You may need to remove the glove compartment or lower dash panel for easier access. Once located, it is usually mounted to the HVAC housing with screws or clips. Always ensure the vehicle is turned off and the battery is disconnected before attempting to replace it.
Resistor pack on blower motor? Fan switch? Low speed relay?
It is in the air conditioner /heater case behind the glovebox.
Under the glove compartment - fixed by two screws