S430 windshield washer inoperable - Mercedes-Benz Forum

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Old 04-22-2011, 01:07 PM   #1 (permalink)
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Date registered: May 2006
Vehicle: 2000 S430, 97 850 T5
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Unhappy S430 windshield washer inoperable

Hey guys, my 2000 S430's windshield washer is inoperable. When I push on the knob on the left-hand side of the steering column, nothing happens, only the wipers work, but the motor to spray water on the windshield does nothing.

I pulled the fuse and disconnected the battery but it still does not work.

Does anyone have experience on how to fix this issue?
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Old 04-22-2011, 01:44 PM   #2 (permalink)
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Tracing electrical stuff on these is a tough one. At the stalk end is the steering column module with electronics in it.
I suggest finding the connector at the washer pump and check for voltage there first.
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Old 04-22-2011, 08:01 PM   #3 (permalink)
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washer pump could be clogged or just DOA and needs replaced. It is easy to get to the pump (behind passenger headlight assembly) and is simply mounted into a gromett so it is easy to pull out and test.... you will just lose all your washer fluid when you pull it out so dont do it in the garage unless you have a catch pan underneath.
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Old 04-22-2011, 09:30 PM   #4 (permalink)
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Vehicle: 2004 (w220) S500 & 2001 CLK320 Cabriolet V6 3.2 L
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I had same issue

I took 2 alligator clips to the windshield pump with 12 volts and nothing happened.

Motor shot.. autohauz az had new one for like $34.00

It is literally plug =n= play

Disconnect power connector & pull straight up.. Then remove the hose

reinstall opposite of removal easiest repair on this car
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Old 04-24-2011, 07:40 AM   #5 (permalink)
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do yourself a favor... if you have to remove or replace the pump (probably), replace the grommets at the same time. This will save you from going in twice as the grommets are as old as the pump, and they do dry out. Pulling the pump may cause the grommet to leak as well.
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Old 04-25-2011, 07:42 PM   #6 (permalink)
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Thanks guys for the replies!

I'll tackle this, i'm on the second washer reservoir anyway due to my brother's incompetence ending up breaking one of two plastic nozzles, so i'll get the part and toss it in.
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Old 04-25-2011, 08:07 PM   #7 (permalink)
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Alright so I removed the pump from the reservoir which took about 5 minutes making sure not to break anything, cleaned the pump as bet I can, blew through both ends (air escaped with velocity) so I know it's not clogged...

So i'll order a new pump and grommet tomorrow and snap it in.

Here's some photos



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Old 04-25-2011, 10:50 PM   #8 (permalink)
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I have spare reservoir for the S class msg me if you want it for $50.00

I thought it was bad & it was a leaky pump fitting so have extra one taking up space
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Old 05-14-2011, 04:13 PM   #9 (permalink)
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My reservoiir is fine poptop, thanks for the offer tho.

I just got around to ordering the pump, will post pics of install, thanks for all your help!!!
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Old 05-15-2011, 08:45 AM   #10 (permalink)
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Don't forget about grommet pictures too!!!
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