OK, I recently installed Xenon headlight bulbs, which required me to remove
the reservoir filler neck, but it seems to be sealing and holds fluid. But,
coincidentally, the washers have stopped working, both front and rear. I
checked the obvious, fuse OK, squirters not clogged, etc. Can't get to the
reservoir to check hose connections because it is buried in the front bumper
cover.

But I don't hear any motor noise that would indicate the pump is working.
Where is the pump? In the bumper also? I hate to take it apart only to find
the pump is not there.

Any other suggestions for diagnosing this? I suspect the pump has stopped
working or a connector is loose somewhere.

Thanks in advance!

--
Stephen Clark
99 Lexus RX300
Houston, Texas USA

 

A forum search argument of "windshield washer RX300" resulted in this link...

https://www.clublexus.com/forums/sho...d+washer+RX300

You might find it helpful in your diagnosis.

Use a VOM to check for voltage applied to the unplugged pump connector when you engage the switch.
If no voltage, go back to the owners manual and insure your working with the correct fuse.

If you have voltage, the pump should read a low ohm ( about 2-6 ohm) across the motor leads side of the disconnected plug.. Direct short (zero ohms) or an infinite (open) ohm reading indicates a defective motor..

 

Thanks for your reply. I found that link also after I posted my question.

Guess I'll have to dig in a little more, and expose that washer pump.

Does anyone know of an inexpensive place to purchase a new pump?

I did Google and eBay searches and came up with nothing.

I am not inclined to pay $82 at a dealer for a new one!

Stephen Clark

 

The Lexus dealers who help sponsor this forum usually sell Lexus parts for 40-50% off list price. I've used www.irontoad.com since I'm in the Northern US, but I think there's one in Texas. Also, I seem to recall a thread a few months ago where somebody found the Toyota part number of the equivalent pump.

 

OK, I checked for voltage at the connector, and it's there. So I'm off to the Toyota dealer to get the Highlander pump 85330-20470 described in previous posts. Should be easy to change, thanks to the procedure that dmc888 posted. Also, thanks to Tammy and bob2200 for your replies pointing me in the right direction!

My wife will be glad to get her washers back.

Stephen Clark
Houston, TX USA

 

Installed the Toyota Highlander washer pump today in the wife's RX300.

Works great!

Thanks again to all for your help. I'll be visiting this forum frequently to see if I can return the favor...

Cheers!

Stephen Clark
Houston, TX USA

 

From what I've read on the forum, there's quite a difference on what different Lexus dealers charge. Maybe your dealer charges less. I'm basing this on common maintenance items (e.g., filters). There's more than 30% off on what you can get the same part for at a local Toyota dealer, retail!

 

Just ordered the toota pump!

$86. Vs. $47. Hmmm, lemme think...