M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

ML500 wiper problem!!!

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Old May 31, 2019 | 12:19 PM
  #1  
Jason Sottilo's Avatar
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ML500 wiper problem!!!

2006 ml500. Wipers won't work in any position. Front and rear wipers. Wiper pumps do work though on front and back. Changed both relays. Nothing. Everything else in the vehicle is working as it should.... lost
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Old Jun 4, 2019 | 11:16 PM
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Check fuse? Not sure if there is one. There must be though.
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Old Jun 5, 2019 | 07:47 AM
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What relays did you check and where were they located?
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Old Jun 6, 2019 | 01:59 PM
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Originally Posted by Maj. Dundee
What relays did you check and where were they located?
The 2 under the hood. And yes, the 30amp fuse was changing out as well.
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Old Jun 7, 2019 | 08:14 AM
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Originally Posted by Jason Sottilo
The 2 under the hood. And yes, the 30amp fuse was changing out as well.

Be more specific as to which ones. Were they A & B?.

Last edited by Maj. Dundee; Jun 7, 2019 at 08:17 AM.
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Old Jun 7, 2019 | 08:46 AM
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Originally Posted by Maj. Dundee
Be more specific as to which ones. Were they A & B?.
Yes
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Old Jun 7, 2019 | 08:54 AM
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Is the steering column plastic cover loose?
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Old Jun 7, 2019 | 08:56 AM
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No. And when I turn the rear switch wiper to on, the light on the dash lights up, but no action.
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Old Jun 7, 2019 | 09:14 AM
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Have you checked the wipers while in the rain sensor mode?
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Old Jun 7, 2019 | 09:16 AM
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Yes. And I have disconnected the rain sensor box and tried turning them on, nothing.
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Old Jun 7, 2019 | 09:27 AM
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Reconnect the rain sensor & spray water on the upper part of the windshield and take it for a short ride and see if it works.
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Old Jun 7, 2019 | 09:28 AM
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Do that while disconnected?
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Old Jun 7, 2019 | 09:34 AM
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Originally Posted by Jason Sottilo
Do that while disconnected?

I said reconnect the sensor.
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Old Jun 7, 2019 | 09:35 AM
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Oh, it's been reconnected and rained on since quite a few times.
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Old Jun 7, 2019 | 09:45 AM
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Grab the steering column cover with both hands and try to turn it, BUT DON'T GO CRAZY doing it.
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Old Jun 7, 2019 | 09:48 AM
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Actually, now that I think about it, when I use the column shift, the whole plastic casing does shift about a 1/2" when shifting.
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Old Jun 7, 2019 | 10:03 AM
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Originally Posted by Jason Sottilo
Actually, now that I think about it, when I use the column shift, the whole plastic casing does shift about a 1/2" when shifting.
You must remove the steering column module and check to see if any electrical connector is dislodged. You must have tools.

Look at this video and see if you can do it.

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Old Jun 7, 2019 | 10:04 AM
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Will do. Thank you!
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Old Jun 7, 2019 | 10:23 AM
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Do this first to see if the module cover is broken. The bolt that holds the module in place has a groove that the bolt sits in. Center the cover and with a T27 extended Torx bit, turn the bolt a bit and feel if the bolt is in the groove. Then turn the bolt a little more and feel again.
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