Disconnect the wire terminal from the "negative" terminal of the battery.
Removing the glove box (see Removing the glove box).
For convenience, you can remove the cross member of the instrument panel (see Removing the heater fan).
Disconnect the wiring harness from the regulator (see Removing the heater fan).
Using a Phillips screwdriver, unscrew the two screws securing the regulator (for clarity shown on the removed heater).
Remove the regulator from the heater housing.
We install the electronic speed controller for the heater fan motor in the reverse order.