Rear windshield wiper broken 2007 Chevy Tahoe.

Rear Wiper/Washer System Components
The rear wiper/washer system consists of the following components:
• Rear wiper/washer switch
• Window wiper module-rear
• Window washer pump-rear
• RR WIPER 15A fuse
• RR WPRB 25A fuse
Rear Wiper/Washer System Operation
The rear wiper module controls rear wiper motor operation. Battery voltage supplied to the module is used to operate the wiper motor in all modes and to return the rear wiper arm to the park position after the ignition is turned off. Accessory voltage supplied to the rear wiper/washer switch is used to supply the rear window wiper and washer switch signal circuits. In wiper switch positions 1 and 2 the wiper switch signal circuit voltage level to the wiper motor module determines the wiper motor delay interval. The rear window washer pump supply voltage circuit is used to provide the operating voltage for the rear washer pump for as long as the rear washer switch is pressed. The rear window washer switch signal circuit is used as a wash signal to the rear wiper motor module to operate the wipers during the rear wash operation.


Did you replace the rear wiper module ?

Possible wiper linkage has broken/seperated from wiper motor. The wiper cowling covering the linkage assembly will need to be removed to inspect/repair

If the motor is working, the linkage between the motor and the wipers has broken. I don't have a Venture, but usually there is a plastic panel below the windshield, where the wiper arms are mounted. You remove the wiper arms, then remove the plastic panel (might be screws or it might just snap out) to get at the linkage and motor. Dealer or auto parts store should be able to order new linkage arms for you.

FIRST TURN OFF RADIO THEN DISCONNECT NEGATIVE BATTERY. MARK POSITIONS OF WIPER ARM ON THE LIFT GATE GLASS,THEN REMOVE WIPER ARM COVER AND NUT AT THE PUTSIDE OF THE LIFT GATE, THEN THE BEZEL, DONT SCRATCH PAINT ON THE LIFT GATE, REMOVE THE UPPER AND LOWER LIFTGATE INTERIOR TRIM PANELS, DISCONNECT THE ELECTRICAL CONNECTOR AT THE REAR WIPER MOTOR, THEN REMOVE THE TWO BOLTS SUPPORT WIPER MOTOR HOLD WIPER MOTOR IN PLACE WHILE REMOVING MOUNTING BOLTS THEN INSTALL NEW WIPER MOTOR THEN PUT EVERYTHING BACK VISA VERSA.

My 2005 tahoe did the same thing. I also bought a new motor, which did not fix. I discovered there was a bad ground. Instead of searching for bad ground, just install a short length of stranded wire with crimp terminals between a wiper motor mounting bolt and a rear glass latch assy mounting bolt to restore good grounding to the wiper motor.

Front Wiper Motor Removal & Installation

NOTE A new wiper motor assembly comes with the linkage arm installed.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Remove the windshield wiper mounting arm and pivot shaft
   WARNING Do not remove the wiper motor linkage arm from the wiper motor assembly. If the arm is removed, the wiper arms may not park in the correct location.
   NOTE Use a suitable tool to separate the wiper linkage arm from the wiper mounting arm and pivot shaft assembly.
   
3. Remove the 3 bolts and the wiper motor.
   
   
   
   Fig. Wiper motor and linkage
   

To install:

1. Install wiper motor and bolts.
2. Tighten wiper motor bolts to 10 ft. lbs. (13 Nm).
3. Install windshield wiper mounting arm and pivot shaft.
4. Check wiper operation.

Rear Wiper Motor - Removal & Installation

1. Remove the rear pivot arm.
2. Remove the rear wiper motor shaft nut cover
3. Remove the rear wiper motor shaft nut.
4. Open the lift gate window.
5. Remove the rear wiper motor cover trim panel.
6. Disconnect the electrical connector.
7. Remove the 2 rear window wiper motor nuts
8. Remove the rear window wiper motor.
   
   
   Fig. Rear wiper motor view-2008 model shown, other years similar
   

To install:

1. Install rear wiper motor and tighten mounting nuts to 62 inch lbs. (7 Nm).
2. Reconnect the electrical connector.
3. Install wiper motor cover trim panel.
4. Install rear wiper pivot arm tighten nut to 53 inch lbs. (6 Nm).
5. Install shaft nut cover.
   
6. Check wiper operation.

Good luck (remember rated this post).

CHECK TO SEE IF MOTOR MOUNTING NUTS HAVE NOT COME LOOSE FROM WIPER MOTOR.

advance auto stores replace wiper blades for free if you buy it from them.If the wiper arm needs to be replaced it has a nut at the bottom of it under a plastic cover.It bolts onto a shaft with splines on it so after replacing it turn it on and check it.You may have to loosen the nut and move to adjust it to get it in the correct position.

SECTION 501-16: Wipers and Washers 1999 Town Car Workshop Manual REMOVAL AND INSTALLATION Mounting Arm and Pivot Shaft Removal

1. Disconnect the battery ground cable (14301).

1. Remove the windshield wiper pivot arms (17527).
   1. Remove the nuts (one each side).
   1. Remove the windshield wiper pivot arms.

1. Remove the LH and RH cowl top vent panels.
   1. Remove the hood weatherstrip.
   1. Remove the screws.
   1. Remove the retaining clips.
      • Disconnect the LH and RH washer hoses.

1. Position the windshield wiper mounting arm and pivot shaft (17566) assembly aside.
   1. Remove the nuts.
   1. Remove the bolt.
   1. Position the windshield wiper mounting arm and pivot shaft assembly aside.

1. Remove the windshield wiper mounting arm and pivot shaft assembly.
   1. Disconnect the electrical connector.
   1. Remove the windshield wiper mounting arm and pivot shaft assembly.

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Motor —Windshield Wiper Removal

1. Remove the windshield wiper mounting arm and pivot shaft (17566) assembly; refer to Mounting Arm and Pivot Shaft .

1. Remove the windshield wiper motor (17508).
   1. Remove the output shaft bolt.
   1. Remove the bolts.
   1. Remove the windshield wiper motor.

Check the wiper motor connection if its touching anything and loose it will automatically ground out and check at connection make sure you put some gel and then snap it in/ Please rate my response thank you very much