Grand Cherokee Dual Control Wiring Diagrams

With the dual control HeaterTreater Jeep Grand Cherokee blend door fix, the auxiliary motor has to be wired into the system to replace the existing back actuator motor. The wires are access from the back of the HVAC control module in the center console. When you remove the HVAC control module, there are two connectors that plug into the back of the box. Remove both connectors and place the control module to the side. Looking into the connector with the wires on the back side, the color code will look like the figure below for the two connectors.

Connector 1

Tn/Blk    --   Gy/Blu Y/Blu    -- Blk/Wt    -- Blk
Grn/Y Blu/Rd    --    --   -- Blk/Wt    --    --

Connector 2
   --   Grn/Wt Blk/Wt Blu/Wt    --   Org
Rd/Grn Y/Grn Grn   - - Wt/Pk Pink

For Left Hand Drive vehicles the Grn/Wt and Blu/Wt(marked in red) wires are used for the new auxiliary motor. The wires have to be cut and the new motor connected to these two wires on the connector side of the cut. The two wires going to the back motor are now isolated. The old motor has to be cut out and the new motor inserted in order for the system to properly calibrate. The green wire from the new motor connects to the Grn/Wt wire and the yellow wire connects to the Blu/Wt wire.

For Right Hand Drive vehicles, the Blu/Rd and Blk/Wt(marked in blue) are used for the auliliary motor. The wiring diagram is different for the RHD vehicle and the connection is made with the green wire from the motor to the Blu/Rd wire and the yellow wire to the Blk/Wt wire marked above. Note that there are three Blk/Wt wires and you have to get the correct one from connector 2.

The new motor has to be mounted "piggyback" on the existing motor. If the motors are reversed, the system will not align properly. The hole through the existing front motor has to be enlarged in order for the axle to fit through the motor and drivers side door to the back door as noted in the instructions.

Once the motors are connected and verified with the 9V battery to be operating correctly, make all the wire connections and force the system to go through a re-set cycle in order for the system to calibrate itself properly. You can reset the system with the sequence of steps found Here.

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