The front screen washer stopped scooshing. It started to scoosh the rear for some reason when working the front. Rear scooshes the rear too. You can hear the pump going for both, but nothing comes out the front.

 Bought a new pump just in case and pulled the car apart to access. Pump has two outlets on it. one front, one rear. without the lines on it pumps fine out of both. nice and strong. Put the lines on, pump front, works, pump rear, works, pump front again and only coming out the rear again. Swapped lines and the issue swaps over too??? One works fine until you do the other, then only the second one works again until you pull the lines off and pump out of both nozzles. Put new pump on. Exactly the same. Pump whirs away both ways.

There was a lot of goo in the front lines when I first took it apart. Blew them through with a stirrup pump and snot came out. Getting a nice strong blast and all seems clear. There's a one way valve on the front line. Removed and didn't make any difference. Can't trace one on rear.

If you pull one line off it'll pump out the other. Cover the open outlet on the pump with your finger and the other line won't pump.

I guess it's got to be pressure related somewhere, but not sure what to do as not tied to a specific water line. Might try seeing if I can get an attachment to run the hose through the lines as that'll clear better than air. I'll not blast with pressure as it'll pop summat somewhere unreachable.

Any ideas? Matches and a rag?

Cheers

The common problem is the seal between the pump and tank.
It is also a rough filter and gets gummed up if the screenwash is too rich and sat for a while.
Cleaning that can make a good difference.







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Cheers for the reply.

I've cleaned that too. It was pretty gummed up, but hasn't fixed it.

May well be the pump itself then, if one side is blocked then it will divert to the other output route.

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I put a new pump on it too. Exactly the same issue with either pump installed.

So-
Cleaned filter.
New pump.
Blown all lines through right to nozzles?
Removed and soaked the nozzles with descaler or vinegar?

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Haven't tried the last one. Worth a go. They seem to pump strong enough, but I suppose may be blocked enough to cause pressure in the system. Cheers.

As it's It's getting late I popped out and poked wire down the jets. Worth a quick poke. If I disconnect the rear line from the pump all four front jets work a treat with a good strong jet from all. As soon as I hook the rear line up the front stops dead and the water comes out the rear jet.

I can exclude all the lines and nozzles as being the problem. Run both pumps with no output lines on and they pump as expected. Put a 12" straight through pipe on the rear output and both pumps flat refuse the pump out the front output. The pumps just spin in different directions for the desired output. You can tell by the torque reaction if you hold the gent in your hand.

Put the sod back together in the end as I need to use it. Not happy. Beat by a poxy little pump and some rubber lines.