I know of only one washerfluid reservoir in the engine compartment. Even when it is full (and the front window washers are working fine), I get the "low washer fluid" warning light. The rear window washer, however, behaves as if it's out of fluid. Does it have its own reservoir that I don't know about, or is it yet another sensor failure combined with a pump failure?

Appreciate any opinons.

 

No just one resivior, probably a pump failure.

 

I'm having the same problem, did you ever figure out what your problem was?

 

I think there is a separate pump for the rear washer.

Some of the failure modes:
Pump dies or connector comes off=no washer spray.
The sensor in the reservoir can get damaged, or the connections can corrode or come loose=washer fluid warning, even when it's full.
There's a hose that goes all the way from the reservoir to the rear lid, and it can rupture, causing blue headliner syndrome.

Freezing can kill the pump and the sensor, I believe.

If you don't care about the sensor, unplug it. If that doesn't get rid of the warning, make a little wire to go between the two conductors on the plug. This should fool it into thinking it's full.

 

thanks for the info, I'll tinker around in there. I don't have warning lights, blue liner, so the reservoir will be where I start looking.