Rear Window Washer - 1992 Astra Estate

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Tue 9 Jan 2007 09:50
Rear Window Washer - 1992 Astra Estate - wbd
Details required please for an Astra estate 1992 rear window washer - does this have a seperate pump/motor/ reservoir system? and if so where is it located?
All comments appreciated.

Brian
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Tue 9 Jan 2007 10:24
Rear Window Washer - 1992 Astra Estate - Dynamic Dave
Pretty sure it uses the same reservoir as the front ones. It *might* have a separate pump, or use the same one as the front windscreen, but the polarity to the motor is reversed when you want to squirt the rear screen. Should be easy enough to see by looking at the reservoir as to whether or not more than one pump is fitted.

I take it there are no problems with the front squirters?
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Tue 9 Jan 2007 10:42
Rear Window Washer - 1992 Astra Estate - wbd
Thanks DD

I,ve just replaced the pump/motor on the "front" reservoir, this has two opposed output pipes.
The front washers work fine.

How ingenius! reverse the drive volts polarity to drive rear window. Rear washer has never worked.

I can check this with a meter, more later.

The fault is a probable blockage in the long run of tubing from the bulkhead mounted reservoir to the rear tailgate window.

wbd
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Tue 9 Jan 2007 10:48
Rear Window Washer - 1992 Astra Estate - Cliff Pope
There may be a non-return valve in the pipe near the tailgate. If it works like the one on my Volvo, it can either fail open, so that it takes ages for the water to get to the far end, or shut, causing a blockage. Trying to unblock it by poking about can simply change it from state 2 to state 1.
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Tue 9 Jan 2007 12:30
Rear Window Washer - 1992 Astra Estate - Dynamic Dave
wbd,

I assume you can still hear the motor pump when selecting the rear squirter?

If so, then try swapping the two pipes over and see if what was the front output now squirts the rear, and vice versa.

If not, then it *could* well be a dodgy wiper stalk. Also check to see if there is a separate fuse for the rear wash.
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