Question about 2005 Chevrolet Tahoe

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My rear wiper is pulsating but not moving - 2005 Chevrolet Tahoe

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  • dlktfamily Jan 03, 2011

    Hello

    Thank you for the quick response, but I thought it was the motor so I replaced it with a new one and it is still doing the same pulsation

    Hope you can help

    Darren

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Try to inject a WD40 into the mechanism (shaft/bearing assembly) and gently move the wiper to rotate the shaft a little, there should be enough play to do this. Extend the wiper from the window pane and let it extended. Turn the contact key on. Go back to the wiper and "help" it rotate. It will start to rotate with difficulty at first, then freely.

You may have to do this once a year before winter. If this does not work, check the fuse and replace it if needed, then go back to step one

Takes 15 minutes

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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The SJB also supplies voltage to the rear wiper motor from SJB fuse 21 (10A) when the ignition switch is in the ON position. This power feed is used to continue the wipe cycle when the multifunction switch is turned to the OFF position. The SJB receives inputs from the multifunction switch that applies ground to the low speed wipe input or applies ground to the intermittent wipe input. When either of these circuits are grounded, the SJB activates the integrated rear wiper relay and power is supplied to the rear wiper motor to move the rear wiper motor from the PARK position. An internal switch in the rear wiper motor then moves to the RUN position which connects the accessory relay power to the rear wiper motor. When the rear wiper motor returns to the PARK position, the internal switch in the rear wiper motor moves back to the PARK position. If the multifunction switch is in the ON position, the rear wiper relay is still activated, power is supplied to the rear wiper motor, and the wipe cycle starts again. If the multifunction switch is in the INTERMITTENT position, the rear wiper relay does not activate until the predetermined dwell time has elapsed, at which time the SJB activates the rear wiper relay and the wipe cycle starts again.

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Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1244 Wiper Rear Motor Run Relay Coil Circuit Failure SJB If the rear wiper is inoperative, Go To Pinpoint Test B . If the rear wiper is always ON, Go To Pinpoint Test D . B1245 Wiper Rear Motor Run Relay Coil Circuit Short to Battery SJB Go To Pinpoint Test B . B1614 Wiper Rear Mode Select Switch Circuit Failure SJB Go To Pinpoint Test D .
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  3. ?‡'
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  14. ?‡'
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  3. ?‡'
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  4. Ignition OFF, connect the harness connector at the rear wiper switch. Disconnect the harness connector at the rear window wiper motor.
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  6. ?‡'
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  9. Verify a test lamp illuminates between the ignition circuit terminal E and ground.
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  12. ?‡'
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