Hi I just picked up a 1980 GMC 4X4, truck is great, but only problem i have is the windshield wipers are real slow. I have a slide switch on the dash and click it right over, and they are just SLOW. Curious if there is an upgrade for when i get into a real downpour. Also i think my fluid pump might be burnt out or sumthing because it doesnt seem to pump out any fluid????? how do you test them?