2004 Prius defroster & recirculated turn on when break or turn

Did you replace the master window switch control on the drivers side?

posssible air ducts not attached

Possibly new cluster (Meter)

mai

The blend door actuated by solenoids may not be working correctly causing a/c cool air to come out of the windshield vents, rather than the regular front vents.

Defroster Valve Actuator 1996 – 1999 1996 – 1999 HVAC Actuators

To Remove:

1. Remove the air distributor assembly.
2. Unclip the defroster valve actuator from the air inlet.
3. Disconnect the defroster valve actuator from the valve.

To Install:

1. Disconnect the defroster valve actuator from the valve.
2. Clip the defroster valve actuator from the air inlet.
3. Install the air distributor assembly.

Heater/Bi-Level Actuator 1996 – 1999 1996 – 1999 HVAC Actuators

To Remove:

1. Remove the air distributor assembly.
2. Remove the clip and the screws that fasten the 2 halves of the air distributor assembly and separate the air distributor assembly.
3. Unclip and disconnect the heater/bi-level actuator from the valve.

To Install:

1. Connect and clip the heater/bi-level actuator to the valve.
2. Fasten the 2 halves of the air distributor assembly together and torque the fasteners to 13 in-lbs (1.5 Nm).
3. Install the air distributor assembly.

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Removal & Installation Recirculation Actuator 1996 – 1999 1996 – 1999 HVAC Actuators

To Remove:

1. Remove the left sound insulator panel.
2. Disconnect the vacuum hose from the recirculation actuator.
3. Remove the recirculation actuator from the valve.

To Install:

1. Connect the recirculation actuator to the valve.
2. Clip the recirculation actuator to the air inlet.
3. Connect the vacuum hose to the recirculation actuator.
4. Install the left sound insulator panel.

Removal & Installation

1. Remove the engine under cover.
   
2. Loosen the clamp, then disconnect the air cleaner inlet from the air cleaner case.
   
3. Referring to the illustration, loosen nut A, then turn adjust bolt B to relieve the V-ribbed belt tension.
   
4. Remove the belt.
   

V-belt removal

To install:

1. Install the V-ribbed belt to each pulley.
   
2. Turn adjust bolt B to adjust the V-ribbed belt tension.
   
3. Tighten nut A to 40 Nm (30 ft. lbs).
   

yes there is a fuse.. does it work on any fan speed or none at all?

2005 was the last year of that Prius design. 2006 started a new design. 2006-2009 use the same tail light.

Velocity sensor or somtimes called speed sensor.   They communicate the transmission to the engine's computer so they know when to shift up or down on the gears. 
Ps: don't break them. Good luck and hope this help's

heater box is warped doors not closing fully