Buzzing rear wiper motor not working - Fix

[WestLinnYukon]

I'm posting this as a solution in case it is helpful for someone because it was bear to figure out. Rear wiper was not working and made a humming or buzzing noise. Almost like a bad motor. Fuses and switch ok. Took motor out, looked okay but ruled out everything else so I got a wrecking yard motor. Installed and same exact noise. Accidentally touched bracket to hatch while testing and it started working. Bad ground somewhere in system. Used a couple self tappers to run a ground wire from bracket to tailgate, works perfect.

Tip: The rear wiper harness has two pig tails that run to both latches so wiper stops when door is open. If testing when door is open, unplug harnesses as this replicate closed to switch.

Hope this saves you a trip to u-pull-it wrecking yard and a bunch of time...

 

[OR VietVet]

I'm posting this as a solution in case it is helpful for someone because it was bear to figure out. Rear wiper was not working and made a humming or buzzing noise. Almost like a bad motor. Fuses and switch ok. Took motor out, looked okay but ruled out everything else so I got a wrecking yard motor. Installed and same exact noise. Accidentally touched bracket to hatch while testing and it started working. Bad ground somewhere in system. Used a couple self tappers to run a ground wire from bracket to tailgate, works perfect.

Tip: The rear wiper harness has two pig tails that run to both latches so wiper stops when door is open. If testing when door is open, unplug harnesses as this replicate closed to switch.

Hope this saves you a trip to u-pull-it wrecking yard and a bunch of time...

West Linn, Oregon near Clackamas or West Linn County, Oregon...Albany, Corvallis or J.C.? Or somewhere else? That's a Jackson's fuel stop in the background.

 

[WestLinnYukon]

West Linn, Oregon near Clackamas or West Linn County, Oregon...Albany, Corvallis or J.C.? Or somewhere else? That's a Jackson's fuel stop in the background.

Picture taken in Washington, but I am in City of West Linn, Clackamas county Oregon.

 

[OR VietVet]

Picture taken in Washington, but I am in City of West Linn, Clackamas county Oregon.

I knew it had to be one or the other. Hopefully you can stay away from the LA LA land of Portland. Stay safe up there. I am in Eugene.

 

[Joseph Garcia]

Thank you for posting the solution to your issue. Our collective knowledge base has been increased.

 

[ChuckNorris]

I'm posting this as a solution in case it is helpful for someone because it was bear to figure out. Rear wiper was not working and made a humming or buzzing noise. Almost like a bad motor. Fuses and switch ok. Took motor out, looked okay but ruled out everything else so I got a wrecking yard motor. Installed and same exact noise. Accidentally touched bracket to hatch while testing and it started working. Bad ground somewhere in system. Used a couple self tappers to run a ground wire from bracket to tailgate, works perfect.

Tip: The rear wiper harness has two pig tails that run to both latches so wiper stops when door is open. If testing when door is open, unplug harnesses as this replicate closed to switch.

Hope this saves you a trip to u-pull-it wrecking yard and a bunch of time...

Do you know if the front wiper motor has a ground too?
I get the same buzzing noise ! But I can’t seem to chase wires and see where the grounds supposed to go - was meddling underneath with the drivetrain, reinstalled the lockdown cable and then all of a sudden the wipers stopped moving too!

 

[TahoeYukonTNfam]

I'm posting this as a solution in case it is helpful for someone because it was bear to figure out. Rear wiper was not working and made a humming or buzzing noise. Almost like a bad motor. Fuses and switch ok. Took motor out, looked okay but ruled out everything else so I got a wrecking yard motor. Installed and same exact noise. Accidentally touched bracket to hatch while testing and it started working. Bad ground somewhere in system. Used a couple self tappers to run a ground wire from bracket to tailgate, works perfect.

Tip: The rear wiper harness has two pig tails that run to both latches so wiper stops when door is open. If testing when door is open, unplug harnesses as this replicate closed to switch.

Hope this saves you a trip to u-pull-it wrecking yard and a bunch of time...

Dude you are a damn genius. I had a bad motor (proven now) but got the clicking with a new out of box motor. Was ready to drive the truck into the lake when I found this. Sure enough...

Bad ground. Ran a jumper wire from one of the 10mm bolts holding the motor assy to the 10mm holding the latch assembly. Works like new.

THANK YOU!!!!