front washers not working HELP

derby dave

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cant get my front washers to work bought a new pump today in desperation as we are going away tommorow but there was nothing wrong with the old one my local dealer warned me that the pumps rarely go wrong is there anything else i can check i hope its not the stalk there is power at the pump the rear washer works ok (seperate pump) c class 2005 39k only had it 3 weeks:(:(
 

Xtractorfan

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Can you change over the pipes to feed from the rear working washer in the meantime.. until you get time to sort it for real, also worth blowing and cleaning nozzles just to make sure u dont have a blockage
 
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derby dave

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yes thought about swopping the pipes, over the pump is definitely not not running on the front screen ?
 

Alex Crow

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do the wipers sweep when you press the stalk?
 

NJones59

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This happened on a Vauxhall Omega I used to own. It turned out it was the filter on the washer system that had become blocked. Simple fix by unclipping the filter and giving it a wash! Not sure if MB uses a filter or not, but may be worth looking.
 

Alex M Grieve

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This happened on a Vauxhall Omega I used to own. It turned out it was the filter on the washer system that had become blocked. Simple fix by unclipping the filter and giving it a wash! Not sure if MB uses a filter or not, but may be worth looking.

Pump failure is uncommon. A complete blockage of the front washers would either be at some point in the line common to both sides, or concurrent blockage of all the jets (which is possible but unlikely).

That would suggest either a filter blockage, or a foreign body either at the exit from the reservoir (visible), or along the line or at the bifurcation of the line where it splits to go to the jets.

If nothing can be seen, it might be worth trying to blow the line out from the washer end, back towards the reservoir. At least you will be able to prove that the line is patent.

If you remove a blockage and it still does not work, change the fuse to the pump, which might have failed because of the blockage.

Good luck, and tell us what the culprit was, when you find it.
 

100%Bitch

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Just a question, but does it have a fuse?
 

television

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It would be doubtful if there was a fuse for this alone,,and is likely to be shared by other components
 

Alex M Grieve

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It would be doubtful if there was a fuse for this alone,,and is likely to be shared by other components

Good point Malcolm, and can be a clue if other items do not work and the fuse is the common factor.

The OP did say there was power at the pump, so I'm hoping it is a mechanical blockage in the water supply line.
 

Miffy

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what about taking a direct 12vdc feed to the pump to see if it fires up, this will give a better indication of where the fault is. if manual power feed starts the pump and water jets work, it leave a lot less possibilities and will take just a few mins to test
 

television

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There are many parts to this,,the stalk goes to the N80 steering control module,,its all CAN controlled,, throught the SAM. STAR will be the only way to sort it I think
 
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derby dave

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hi sorry about the reply's but we went away to sunny suffolk and very nice it was, anyway checked the old pump with a direct feed worked fine but had already fitted the new pump, there is power at the two pin connector but it won't work from the stalk, its not blocked as i swopped delivery pipes over from the rear, the indicator stalk looks a b*****d to remove, i was wondering if merc might pick up this repair considering the year 05 fairly low mileage 39k but have yet to have any dealings with mertrux as i have only had the car 5 weeks
 

television

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If it is the stalk,,and it could be,,some pull off the end cap and spray switch cleaner down the tube, with some success
 
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derby dave

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thanks for that i will try that when you say the end cap, does it just prise off ??
 

Dec

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There will be a non return valve around where the tube splits into 2 so bear in mind that an air line might not clear the blockage so it might need to be disassembled to clean properly… that is, if that is the cause of the problem.

See also… http://forums.mercedesclub.org.uk/showthread.php?t=38617 not your car, but should be a similar set up.

Dec
 

Alex Crow

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do the wipers sweep when you press the stalk?
 

merc7

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The bitch maybe right the pump ran dry& blew fuse or pump cavitated !
 
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derby dave

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yes the wipers work no the fuse is not blown (power at the two pin connector)there is no blockage in the pipework and i have replaced the pump with a new one checked the old pump and that works ok tried to get the end off the stalk but it doesnt look like its supposed to come off its an 05 c/class are you sure it comes off ??
 

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