V70 - Another Windscreen Washer Issue!

[JNMann]

Another new pump motor and same issue so I know it isn't that. Always the same, everything works for a few seconds then stops pumping water. Just front connected works fine. Connect rear and water stops pumping to front and back. Leave pipes off and water jets out of both sides all day long.

Thought plug onto pump may be fault so removed wires and attached direct to motor, same issue.

My only possible thought is something is happening with rear motor but this is proving impossible to fix!

[ma70]

It's gotta be blocked pipes/jets IMO, either that or broken ones but the fact it does work sometimes kind of rules that out...

We had a lot of trouble with the washer on one of our Xantias where it'd work for a few seconds then either go weak/one jet or nothing. it was crap in the pipework and jets.

[ASt85]

Originally Posted by JNMann

Going to try another motor and wondered if someone can confirm exact part number for my car please?

The part that came off is 1S71-17K624 FD, I've seen others ending in FE on eBay but not sure if these are different?

Just wondering if there are very slight differences that may be causing this issue.

I also saw an exploded view of the whole area somewhere, anyone link me to that again please?

The link you want is this one, sorry to have missed your earlier post.

https://www.volvoforums.org.uk/showthread.php?t=268387

[JNMann]

Originally Posted by ASt85

The link you want is this one, sorry to have missed your earlier post.

https://www.volvoforums.org.uk/showthread.php?t=268387

Thanks but this is a different model, mine has the single pump motor with twin outlets, the diagram here is two different pumps.

[JNMann]

Originally Posted by ma70

It's gotta be blocked pipes/jets IMO, either that or broken ones but the fact it does work sometimes kind of rules that out...

We had a lot of trouble with the washer on one of our Xantias where it'd work for a few seconds then either go weak/one jet or nothing. it was crap in the pipework and jets.

Yeah, I kinda thought the same but when front and back work there's a strong constant jet so I'd pretty much ruled that out. I guess forcing air through might not be a bad idea anyway.

The way things are going I'm gonna have to put seal off the rear washer and put the car back together. Luckily I haven't needed it recently but really need to look to getting it on the road now.

Only other thing I could think of was a faulty stalk on the wheel but feel this is unlikely?

Appreciate all the advice :-)

[petey]

Be cautious about using compressed air; it’s very easy to ramp up the pressure far higher than a pipe connector normally sees and then you’ll split a pipe apart introducing a further problem rather than enact a solution.

Ask me how I know......

[JNMann]

How do you....hahaha

I have one of these electric air blower for pc's etc so might be ok as less powerful than a hose line.

[JNMann]

I've replaced the pump motor yet again and also now replaced the plug and terminals going onto it.

I now have no power to the pump whatsoever and it does nothing! This is just going from worse to worse :-(

Checked obvious fuses and all seems ok. No reading at the pump whatsoever.

Can anyone please shed any possible light on this before I lose all of my hair?

Many thanks.

[Volvotastic]

Originally Posted by petey

Be cautious about using compressed air; it’s very easy to ramp up the pressure far higher than a pipe connector normally sees and then you’ll split a pipe apart introducing a further problem rather than enact a solution.

Ask me how I know......

I used a cycle pump to gently push air back from the bonnet washer pipe though the pump and that bubbled up into the tank.

I also then added warm/hot water to see if that would release anything.. Yes it did. See the photo of the bucket where we collected the water we siphoned off from the tank and you can see lots of thicker blue strands almost like cotton. There seems to have been a build up of the washer fluid chemicals. I buy my washer fluid from Morrisons so may be time to change supplier.

Washers not working = MOT failure and I have an MOT on Monday!!!