CharlieH

I have a 2000 Lexus RX 300 with 225k miles. The rear wiper squirt does not work. First used a pin to clean out port. No luck. It may be the motor pump. Don't hear a pumping sound. If its the pump, how do I get to it to replace. Thanks for your help.

salimshah

The pump motor for the front and the rear is the same in the same reservoir. The motor just spins the opposite direction.

Just trace down the filler neck to locate the reservoir. The pump sits at the bottom. Access is by removing the plastic shield on the passenger side front corner.

You can start by checking voltage at the connector [+12v for front and -12v for the back]. Or taking the motor out and bench test it [check for reverse spin with reverse voltage].

Salim

trhs75

This may be a silly question, but does that mean the pump may operate correctly spinning in one direction, and be monfunctional spinning in the other direction?

salimshah

Motor spinning is just one part. There are valves built in which direct which way the fluid will be pushed out.

Problem can be in any of the following places [not a comprehensive list]

Stalk switch
Wiring to the motor
motor itself
valves which direct the output
hose and connector leading to the squirt nozzle [blockage and leaks]
nozzle
all connectors in the wiring from the the stalk to the motor.

Salim

trhs75

Interesting to know, Salim! Thank you!