Connecting electric washer pump

Hello Folks. 1979 Chev Van G20 series, 350 I'm adding electric washer pump - - what wires operate pump on wiper motor?
Thanks. JS

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Did this mature model come originally with a pump?
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They did in 69 so I suspect they did ten years later.
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I would think so, but just dont remember all the details. My first Mustang of that era had a Trico pump, IIRC, which was activate by your foot.
The earliest GM pumps that I can remember were mounted on the wiper motor. Although it should be easy to find the connections, those washer systems were prone to problems, and it might be a whole lot easier just to rig an aftermarket unit and bypass the GM unit.
I'll take a google and see if I can find some pictures.
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wrote in message

My 68 Mustang also has the foot operated pump, but my 69 Impala had electric that was integral to the wiper motor.
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I found the pump kit, and some universal alternates, as follows: http://www.rockauto.com/catalog/x,carcode,1045370,parttype,8840,a,www.bing.com%2BSearch%2Bfor%2B1979%2BCHEVROLET
Now, this sort of supports the suspicion that I have that this pump is a part of the wiper motor.
Im sorry but have no access to the wiring diagrams to be able to help identify the actual wires.
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Original wiper motor + replacement motor I recently installed have pump integral to wiper motor. New wiper motor washer pump does not operate -- no usual clicking noise when pump successfully activated - even though wiper motor works. I suspect juice ( electricity ) not getting to activator of washer pump on wiper motor - so I bought aftermarket electric pump - trico - I'm wondering what wires to wiper motor operate pump section - so that I can connect electric pump.
Thanks for replies.
-JS
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wrote:

OK, now the question makes more sense... I'd suggest starting by doing some diagnostics to determine whether the wash 'signal' (voltage) is getting to the (new) motor or not. If it is, then the solution should be obvious. If not, you'll have to dig into the circuit, though I'd suspect the washer switch first, then any inline connectors.
See if you can find a schematic of that circuit, perferrably one with connector pin numbers, that will make (your) life much easier.
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On Wed, 09 Sep 2009 08:49:52 -0400, PeterD wrote:

Old, replaced wiper motor/pump assembly was balky as wiper but washer pump worked fine when activated - therefore switch is not suspect. I believe wiper motor gets voltage all the time when key in ignition or acc. setting, and motor activated by switch providing ground when pushed on. Therefore what I'm looking for is 2 wires to electric aftermarket pump -
- voltage all time when key in acc. or ignit. ( on ), - and wire that provides ground when wash button on dash is pushed.
The trouble with this vehicle is that visibility + access to wiper motor + wiring is minimal - under dash, over brake pedal. Any info re. which two wires satisfy above description is appreciated. Otherwise I'll do it the hard way by measuring with VOM at different wires . Again , access difficult + wipers moving on windshield during experimentation requires constant application of water manually + limits duration of each test.
Thanks. -JS
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