I have a 85 Wiper/washer motor in my 83. I changed the firewall to accomplish this. Like most GM wiper-powered washers, it don't work. My 91 S-10 has the pump at the base of the washer fluid reservoir. Did Any ThirdGens come with this type of setup?

 

I'm not sure if the later 'F' cars had the motor driven pump, but you can get a pump valve replacement kit to repair your existing pump for about $5. The alcohol in the washer solvent is very hard on the rubber components of the pump, and after ten years of soaking in it, I'm not surprized yours doesn't work.

 

yes '88 up had the pump in the base....

 

It is not an issue if it is repairable; I have had GM's for a long time- the washer pumps are notoriously unreliable. A few Fords I have owned have the other design- much more reliable. My 71 will get this soon also.