Tip & How-To about Chevrolet Tahoe

Fix 2005 tahoe rear wiper (other year GM SUVs may also apply)

My 2005 tahoe rear wiper was inop. The symptom was a pulsating buzz coming from the wiper motor, but no wiping action. I mistakenly bought a new wiper motor, which was not the cause. It was a bad ground, so instead of hunting the bad ground, I just added another grounding wire to the motor. Maybe my experience can help you. Make sure ignition is off and wiper is off. (As an added safety precaution disconnect the negative battery cable to prevent unexpected wiper action). To get access to wiper motor, open rear window glass to remove upper window trim surround. On either side of the window latch there are two black flat plastic "buttons". Release these by pushing from behind with a flat blade screw driver to pop out the center pin. With the pin extended the whole button can be pulled out. Open the tail gate and gently pry under the upper window trim to release clips from underneath. Remove upper window trim. Now to remove lower tailgate panel, remove bolt holding the pull strap. remove pull strap. As before gently pry lower panel to release clips from underneath. When all are loose, lift panel vertically to remove, by releasing the two "fingers" that fit into slots. Now that the motor is exposed, cut a short length of insulated stranded wire (like lamp wire) and crimp-on some terminal ends(just the stripped bare wire ends will also work). Attach from under a wiper motor frame mounting bolt (do not use either of the rubber insulated bolts) to under a mounting bolt on the window glass latch assy. Or you can also select any motor grounding point to any vehicle chassis grounding point as desired. Op test the wiper. Note: The window glass and tailgate will have to be closed to test. Hopefully it works properly. Put everything back in reverse order. Remember to slide fingers of lower panel into their slots before pushing clips secure. Also after remounting upper glass trim, fully insert the two plastic latch buttons with center pins extended, and then push in center pins.

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Wiper control module location on a 2000 f250


Did you check the wiper relay's in the under hood fuse box ? There are two ,wiper run/park relay & wiper high low relay ! Also ,did you check fuse's ? fuse # 11 - 30amp location cental juction box . The wiper switch is a input to the GEM module . Generic electronic module . The module in most cases isn't the problem ! Learning how to test these electronic systems is , people do not know how to test so they just replace parts . What they should do is take the vehicle to ford certified Technician who has the knowledge and testing equipment to find an fix it .

The generic electronic module (GEM) receives inputs from the following:
  • multifunction switch
  • anti-lock brake control module (vehicle speed signal [VSS])
  • ignition switch
The GEM uses these inputs to control the outputs to the following:
  • windshield wiper high/low relay
  • windshield wiper run/park relay
  • windshield washer relay
  • rear wiper motor relay
  • rear window washer relay

  • GEM Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1240 Wiper Washer Rear Pump Relay Circuit Failure GEM GO to Pinpoint Test K . B1241 Wiper Washer Rear Pump Relay Circuit Short to Battery + GEM GO to Pinpoint Test K . B1342 ECU is Defective GEM CLEAR the DTCs. REPEAT the GEM self-test. If DTC B1342 is retrieved, INSTALL a new GEM. REFER to Section 419-10 . B1431 Wiper Brake/Run Relay Circuit Failure GEM If the windshield wipers are inoperative, GO to Pinpoint Test B .
    If the windshield wipers stay on continuously, GO to Pinpoint Test C . B1432 Wiper Brake/Run Relay Circuit Short to Battery GEM GO to Pinpoint Test B . B1434 Wiper Hi/Low Speed Relay Coil Circuit Failure GEM GO to Pinpoint Test D . B1436 Wiper Hi/Low Speed Relay Coil Circuit Short to Battery GEM GO to Pinpoint Test D . B1438 Wiper Mode Select Switch Circuit Failure GEM If the windshield wipers are inoperative, GO to Pinpoint Test B .
    If both the windshield and rear window wipers are inoperative, GO to Pinpoint Test L . B1441 Wiper Mode Select Switch Circuit Short to Ground GEM GO to Pinpoint Test C . B1446 Wiper Park Sense Circuit Failure GEM If the intermittent windshield wiper speed does not operate correctly, GO to Pinpoint Test E .
    If the speed dependent interval mode does not operate correctly, GO to Pinpoint Test G .
    If both windshield and rear wipers are inoperative, GO to Pinpoint Test L . B1450 Wiper Wash/Delay Switch Circuit Failure GEM If the intermittent windshield wiper speed does not operate correctly, GO to Pinpoint Test E .
    If the wash and wipe function does not operate correctly, GO to Pinpoint Test F .
    If both the windshield and rear wipers are inoperative, GO to Pinpoint Test L . B1453 Wiper Wash/Delay Switch Circuit Short to Ground GEM If the windshield wipers stay on continuously, GO to Pinpoint Test C .
    If the wash and wipe function does not operate correctly, GO to Pinpoint Test F . B1458 Wiper Washer Pump Motor Relay Circuit Failure GEM GO to Pinpoint Test F . B1460 Wiper Washer Pump Motor Relay Coil Circuit Short to Battery GEM GO to Pinpoint Test F . B1473 Wiper Low Speed Circuit Motor Failure GEM If the windshield wipers are inoperative, GO to Pinpoint Test B .
    If the windshield wipers do not operate at high or low speed correctly, GO to Pinpoint Test D .
    If the intermittent windshield wiper speed does not operate correctly, GO to Pinpoint Test E . B1475 Accessory Delay Relay Contact Short to Battery GEM REFER to Section 501-11 . B1476 Wiper High Speed Circuit Motor Failure GEM If the windshield wipers are inoperative, GO to Pinpoint Test B .
    If the windshield wipers do not operate at high or low speed correctly, GO to Pinpoint Test D .
    If the intermittent windshield wiper does not operate correctly, GO to Pinpoint Test E . B1611 Rear Wiper Mode Switch Circuit Failure GEM GO to Pinpoint Test H . B1614 Rear Wiper Mode Switch Circuit Short to Ground GEM GO to Pinpoint Test I . B1820 Rear Wiper Motor Up Relay Circuit Short to Battery + GEM GO to Pinpoint Test H . B1839 Rear Wiper Motor Circuit Failure GEM GO to Pinpoint Test H . - All other DTCs. GEM REFER to Section 419-10

Jun 06, 2017 | Ford F-250 Cars & Trucks

1 Answer

how to repair rear window wiper on 2002 chev venture


Good day, if you can hear a pulsating buzz coming from the wiper motor, you probably have a grounding problem. If you do a fixya search for 2005 Chevrolet Tahoe, then at bottom of page under how tos I have a tip to fix rear wiper. If Chevrolet used that same wiper motor on your car, maybe it will fix yours too. Since it is a different model removal of panels to get wiper motor access will be different, then connect a wire from wiper motor frame to a good chassis ground. Good luck.

May 12, 2010 | 2003 Chevrolet Venture Passanger

3 Answers

My rear windshield wiper stopped working on my 2001 Chevrolet Tahoe. I can hear the motor working but when we replace the motor it still wont work.


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.

Apr 02, 2010 | 2001 Chevrolet Tahoe

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