Wiper fluid not flowing

[Presidio]

I did a search but didn’t see anything.

I have replaced my pump motor and nozzles with brand new ones and the fluid still barely gets to the windshield.

I was thinking of draining the reservoir and running a water/vinegar solution or just using some coffee machine descaler solution through the lines.

Is that what I need to do or is there something else I’m missing?

 

[western flyer]

Not a lot of other things left.
You could check to see if you are getting full voltage to your pump when it is operating (e.g., could be affected by a poor ground). Then you can change the hose lines between your new pump and new nozzles. I only run distilled water through all my washers since our domestic water is quite salty. I replaced the pump on my used 80 with an OEM one once I discovered the previous owner had installed a non-OEM one (that was lame). You can also operate the washer pump with just a short section of hose attached to see if you are getting good flow, so as to narrow down your diagnosis.

 

[Presidio]

Not a lot of other things left.
You could check to see if you are getting full voltage to your pump when it is operating (e.g., could be affected by a poor ground). Then you can change the hose lines between your new pump and new nozzles. I only run distilled water through all my washers since our domestic water is quite salty. I replaced the pump on my used 80 with an OEM one once I discovered the previous owner had installed a non-OEM one (that was lame). You can also operate the washer pump with just a short section of hose attached to see if you are getting good flow, so as to narrow down your diagnosis.

I will check the line closer to the pump. I did use OEM parts. I was hoping to not replace all the hoses. I did replace the section between the nozzles already.

 

[ZetheGSD]

Are you testing this with the hood shut? Also disconnect the line at the junction of the back passenger area of the hood. Hit the button. If the stream is good work your way using this method to the nozzles. It isn’t difficult, but any slight kink in the rubber will act like a weak pump. This is a common issue with the 80 as the lines run in and out of the wire harness as well as around little areas where it’s easy to crease the rubber line when doing repairs and it visually seems fine.

I’m 100% sure if your motor is pumping fine then you have a rubber line kinked or clogged somewhere…

 

[CharlieS]

There is also an inline diverter valve that switches the flow from front to rear sprayers that can fail. I wonder if it could result in an issue like yours?...

If you undo the line from the tank/pump where it enters the diverter you can verify if you are getting sufficient fluid volume.

Likewise you can verify that you are getting good fluid volume through the diverter if you take off the upstream lines that feed the sprayers.

The diverter is bolted to the us driver side inner fender in the engine bay.

I used this part on my '94, but I don't know cross compatibility:

85321-60050 Toyota Land Cruiser LX450 Washer Diverter valve sub-assembly

 

[DIRTBIKEUSA]

I’m having the same issue. Front washer is weak stream as the other member is describing. Thought at first the pump was weak and needed replacing. Glad I waited..

 

[TXMeatball]

There's an electronic valve that diverts fluid to the rear wiper. I bypassed it with some parts store vacuum junction and just power the front now.

 

[thedoughboy]

There are a few locations where the tubing for the rear washer is spliced together. One under the door molding (rear driver's side) and another in the jack storage compartment. My tubing was blocked by a piece of rubber that got caught up in the jack storage splice location. I believe it was part of the original diverter valve that broke off and worked its way down the tube.