Washer pump weirdness?
My original stock windscreen washer pump failed last summer. It started to leak from a split in the casing.
Anyway, I stuck a ECP genetic pump on for about £7 and it worked. I have a 156 SW so it sprayed the front or the rear as required.
About October time it stopped spraying the back and only sprayed the front. No matter what I requested at the stalk switch. Rear didn't spray front did no matter which way I pulled the stalk.
Swapped it for a pattern part from shop4parts.
Worked until last week. Again, the exact same failure. Now only sprays the front.
At the weekend I took the pump out, checked the pipes, swapped pipes over and flush through.
Reassembled and it worked again.
Stopped again today.
Same issue, any washer request on the stalk gets the fronts working, nothing from the rears.
The stalk is outputting the right voltages because giving the pump a whack sorts it for a while.
Now the first cheap exchange was a generic part.
The second was a proper pattern part.
I've just ordered a genuine Alfa pump at £37!
Is there anything else likely to be causing this?
I'm happy the stalk is okay, because simply whacking the pump sorts it briefly.
Any thoughts on cause?