washer pump problems

I am restoring a 66 mustang. I have rebuilt my 2 spd winshield wiper motor and rebuilt its entire wiring according to the wiring digrams I have. now my wipers works perfectly yet I have a minor problem. when I pull the wiper motor switch to activate the washer pump it doesn't work, yet if connect the (-) cable (ground) anywhere ( dash board for instance) except for its location on the motor, the washer pump works. can any one tell me what the problem might be?
and some more questions:
can I use any washer pump I want or do I need a speciefice one? as the one I am using is not the original.
normally, when pull the switch should the wipers work after the water splash or not?
please help...  

Recheck your wiring. Sounds like something is shorted or not grounded properly.
Probably any 12V washer pump with a similar amp rating as the original should work without blowing a fuse.
Most washers initiate simultaneous wiper blade movement when activated. I have a 2 speed wiper with washer system in my '66. If I push my wiper switch like I wanted to spray the windshield the wipers come on automatically even though there is currently no spray. I removed the washer bag and pump to save space and weight.  

thanks alot for the reply..
you mean push or pull (the switch) as I have no pushing option??? do you think there might be something defective with the switch? you see it is a brand new switch...it is quite strang as everything works fine except for the washer pump help . sorry for the silly question but I understand that if I conected the(-) wire (ground) anywhere the wipers are still supposed to work regardless of where the pump's (-) is connected?
mean while I will try to re-check the wiring...  

My 66 washer only sprays when the sw is pulled and the wipers only work when the knob is rotated. The washer function does not activate the wipers. Check for 12v at the washer motor when the knob is pulled and key is on.  

thanks for you answers, realy appreciate it.
here is what I got after re-check. the wipers work fine (both speeds), they return to original position when turned off, when the knob is pulled the washer pump sprays and they wipers do not go on automaticlly unless the knob is rotated... I hope I got it right?  

Sorry, I said push instead of pull. Pull = spray only. Pull and rotate = spray and wipers.
On my set up if you push the wiper switch knob in it will make the wipers swipe as long as the switch is being pushed. As soon as you release and quit pushing the wipers stop and return to normal position.
If the knob is neither pushed nor pulled but rotated, then the wipers will continue to operate at one of the speeds selected until the switch knob is rotated to the off position again.  

thanks alot
I don't remember if I have a push option on my switch, as I have said before its new reproduction purchased from cjpony, so it is supposed to be functional I will re-check again maybe I should losen the knob pull it out alittle then tighten it again, I will let you know how it went...
is your switch modified or original?  

Its an original switch as far as I can tell. If it was ever replaced then it was done with a replacement Ford part a long long time ago.  

I have re-checked...my switch has no push option, only pull, I got another original switch it also has no push option  any body??? can anyone verify??? have I got the wrong switch????  

lucilleO, I think your switch is working the way it should. I've owned a lot of early Mustangs and none of them had the push option. This is the first '66 I've owned and don't know for sure if the push option was a modification by the previous owner or dealer or if that was something special that could be ordered from the factory. My switch is an original Ford switch ( I looked at it when I had the dash apart) but could be a replacement part for a Cougar, Comet or another Ford product that had that feature and was installed because that was all you could get back in the day. I think the standard Mustang switch works like yours does. Mine may even have a short in it that allows that to happen. Mine is probably the odd ball.
Bottom line is I think you are OK. As long as you have two wiper speeds that work and wiper spray you are good to go.  

my 65 coupe also works the way lucilleO explained, 2 speed wipers--turn one click for slow speed--2 clicks for high speed. the knob must be pulled for washer, and although the wipers will continue to work if they are turned on when the knob is pulled, the wipers will not auto come on when the knob is pulled.  BTW my washer does not shoot the water high enough on the windshield----any suggestions??
  didn't mean to hi-jack this thread but thought this was a good opp to ask!  HAVE A SAFE AND HAPPY WEEKEND  

thanks alot everybody, you've really helped me...hope people will find answers here in the future, as I couldn't find anywhere over the web.
orgpony...as to your probelm...I would recomend you to check the hosing from the water bag to the nozzles including the nozzels themselfs, these might be obstructed or semi-obstructed. had the same problem with my new car it toke a lot of work to clean the dirt and stones from the hosing and nozzels, I think this would be easier to perform in a mustang as the engine compartment is larger than the crowded VW engine compartmet. to perform these I used a very fine needle (for the nozzles) and high pressure air ( for the rest of the system).
you can also test your pump by temporarly replacing it with one you know is working, I geuss you don't have to buy it, you can simply borrow it from other car