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Mercedes ML500 windshield washer doesn't work

Mercedes ML500 washer tank was leaking, removed it and found that the second pump (for rear washer/wiper) was actually what was leaking through its housing. Disconnected and removed it and temporarily plugged hole. Now the tank holds fluid again and "low fluid" light on dash is out, but front windshield washer doesn't work. I put a meter on the connector to that pump and read no voltage when "wash" lever is activated. Only thing I can think of is that this car is smart enough to detect the open circuit on the disconnected second pump and shut the whole system down. Could this be true?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

freetek
  • 5568 Answers

SOURCE: Broken windshield wiper motor in 1990 Mercedes E300

If this MB is built like others I have known, this is going to be a chore. Some models required the removal of the dashboard to replacement the wiper motor. I recall hearing from a frustrated owner (former brother-in-law) that the dealer-estimated labor time was 5 hours.
I wanted to refer you to Chilton or Haynes for an aftermarket manual but surprisingly, neither of them offer one covering your 1990 year. 

Posted on Jan 29, 2009

lastech
  • 408 Answers

SOURCE: '94 Mercedes-Benz S320 Windshield wiper will

hello,have you check your wiper relay located on top of main fuse box,maybe poor contact,or your combination switch for wiper have worn-out mechanism,or your wiper motor need tobe check the condition,ty

Posted on May 03, 2009

  • 58 Answers

SOURCE: Windshield wiper fluid won't squirt

When you pull the lever to activate the windshield washers, do you hear any type of sound coming from under the hood?  A whirring sound should be heard from the little electric pump that feds the washers.
If you can hear the whir, then you should look for a possible clog in the washer hoses (there is more than one...).
If you cannot hear the whirr, then you should check the fuse that protects the windshield washer circuit.  Check your owner's manual for the location and correct amperage for this circuit.
Good luck!

Posted on Jun 16, 2009

  • 5 Answers

SOURCE: Mercedes c230 windshield wiper starts on its own

Car has rain sensing windshield.Most likely you have the wiper on/off level in the intermittent position,which turns on the sensor. When the sensor detects moisture or even dust sometimes. It turns on wipers. Just make sure the wipers are off and not in the intermittent position.

Posted on Jun 17, 2009

  • 55 Answers

SOURCE: The windshield wipers on my 2004 mercedes e320

It sounds like you have what is known as a short to power. I would suggest having an automotive electrician/technician take a look at the electrical wiring and your switches. I believe it may be inside your turn signal switch. It sure sounds like many issues Ive seen over the years and the switch was the culprit. Good luck.

Posted on Aug 24, 2009

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In my 2007 Saturn Vue there is what I think is an air pump which is cracked that one port is not connected to anything.


There is a electric motor that pumps washer fluid . Located in the bottom of the washer fluid tank .
Wash Operation (Front and Rear Wipers)
The front and rear washer systems use the same windshield washer fluid pump. When either the front or rear wiper is in the washer position voltage will be supplied to one side of the windshield washer fluid pump (depending on whether it is front or rear), while the other side of the pump is grounded.
At this point, the windshield washer fluid pump sprays solvent onto the windshield. When the front or rear washer is activated, the BCM receives an input from the switch that is activated. The BCM will control the wipers while in the WASH mode. The BCM will control either the front wiper relay or the rear wiper relay to turn on the wipers. The windshield wipers operate at low speed for 3 swipes and returns to the park position.

When turning on the washers do you hear the motor run ? Have some one try it while you listen at the washer fluid tank ! These pump motors do go bad .
turn OFF the ignition.
Disconnect the harness electrical connector of the windshield washer fluid pump.
Connect a test lamp from the windshield washer pump control circuit to a good ground .
Turn ON the ignition, with the engine OFF.
Press the front washer switch.
Does the test lamp illuminate?
YES or NO !

Nov 18, 2016 | Saturn Cars & Trucks

1 Answer

I HAVE ML500 MERCEDES BENZ 2006. THE CAR CRANK WELL BUT DOES NOT START, I CHANGE FUEL PUMP, FUEL FILTER, CRANK SENSOR, SPARK PLUG AND MASS AIR FLOW. BUT THE CAR IS SAME PROBLEM.. WHAT IS THE POSSIBL


does this car have a timing belt on it did it break , open the air box spray a little ether in it should start ,do not disconnect anything just do this , get back ,

Sep 15, 2014 | 2007 Mercedes-Benz ML500

1 Answer

Windshield washer stopped working in 2005 chrysler 300 limited


Can you hear the (washer) motor run? Have someone hit the squirters with the key on and out your ear to the filler tube to see if you can hear the pump running. If yes, common for the impeller to spin off the shaft of the motor. I have found that the replacements at the auto stores work rather well. Something of a pain to remove the tank though!

Mar 02, 2014 | 2005 Chrysler 300

3 Answers

We were told that our windshield washer filter was clogged when we reported that it was working poorly to the dealer that we bought our used 2005 Hyundai from. They fixed it, but it's doing it again, just...


sometimes there is, and sometimes there isnt, if there is one it will be on the bottom of your windshield washer tank.. sounds like they fed you a line of **** to me... and if they arent i would take it back and ask them why its doing it again, and why they didnt clean the tank out before... theres something else going on.. either a leak in one of the hoses, your low on fluid, or the pump is weak... i think they fed you a line.. hope this helps

Dec 06, 2010 | 2005 Hyundai Santa Fe

1 Answer

Located washer fluid rear windshield


Sometimes the rear washer fluid tank is located in the rear hatch area. you may see it when you open the hatch, it will be on the side with a cap covering where you wouuld put the fluid in. If the nozzle is clogged you can use a small pin and stick it in the hole to try to dislodge ant debris in the hole.

Jun 03, 2010 | 2004 Hyundai Santa Fe

1 Answer

Mercury villager 1994 washer pump not working


the pump motor likely is bad. get a used washer fluid reservoir at a pick n pull yourself or at car-part.com. page with * is lowest cost.

Pump and Reservoir, Windshield Washer Removal
  1. Disconnect the battery ground cable (14301).
  2. Raise and support the vehicle.
  3. Remove the RH wheel (1007).
  4. Remove the RH front fender splash shield (16103). Refer to Section 01-02 for the removal procedure.
  5. Remove the windshield washer reservoir top bolt.

  6. Disconnect the windshield washer reservoir fluid level sensor electrical connector.
  7. Disconnect the rear window washer pump electrical connector from the rear window washer pump.
  8. Disconnect the windshield washer pump electrical connector from the windshield washer pump (17664).
  9. Place a suitable drain pan under the windshield washer reservoir (17618) and drain the washer fluid.
  10. NOTE: The rear window washer hose end is color-coded, matching the connector on the rear window washer pump. Match the colors to ensure proper installation.

    Disconnect the washer hoses from the windshield washer pump and the rear window washer pump on the windshield washer reservoir.

  11. Loosen the two windshield washer reservoir side bolts.
  12. Remove the windshield washer reservoir by sliding it out of the side slots.
  13. Remove the windshield washer pump.

    Installation
To install, reverse the removal procedure. Tighten the lug nuts (1012) to 98-118 Nm (72-87 lb-ft).

Sep 09, 2009 | 1994 Mercury Villager

2 Answers

Rear windshield washer, no liquid coming out @


check that the jet is not clogged.take a very thin piece of wire,like from a twist tie and clean the hole. maybe the hose is pinched or disconnected.if you spray the rear,you should hear the pump working.i have seen hoses come off and if you spray for 20 seconds,it may leak from the car

May 15, 2009 | Chevrolet Chevy Cars & Trucks

3 Answers

2005 Malibu Maxx, rear windshield washer problem


Mine had this problem it was the motor on the fluid tank front driver right behind the bumper too the headlight out and there it was had to syphon all the fluid out its a 2 way motor so your front might work but the back wont

Mar 22, 2009 | 2006 Chevrolet Malibu Maxx

1 Answer

Wash wipe on a Focus 2000 model


I blieve it's the same pump taht runs the rear and front washers.

The windshield washer comprises the following parts:
  • Windshield washer reservoir, below the front left-hand fender
  • Washer pump, on the outside of the washer reservoir
  • Two washer nozzles on the hood/bonnet, adjustable.
---------------------------------------------------------
Windshield Washer Pump and Reservoir Removal
All vehicles
  1. Remove the windshield washer reservoir filler neck.
  1. Raise and support the vehicle. For additional information, refer to Section 100-02 .
  1. Remove the right-hand fender splash shield (wheel shown removed for clarity).
  1. Remove the washer reservoir.
    • Disconnect the electrical connectors.
    • Pull off the hoses.
  1. Remove the windshield washer pump with rubber gasket (shown with reservoir installed).
    1. Disconnect the electrical connector.
    1. Disconnect the hoses.
    1. Lift out the pump.

Feb 27, 2009 | 2000 Ford Focus

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