The wiper and windshield squirt were intermittent for a time and now have failed completely. Have removed the switch. How do I diagnose whether I need a new switch, new motor, both or neither? And if I need a new part, any hints on where to order it? I'm in Canada, where the '90 pu was never imported.

I was on this site for years but am now using someone else's account. On mine, my password was apparently cancelled. I couldn't change it -- or communicate with the site -- because I didn't respond to a CAPTHCA prompt. But there was no such prompt.

Thanks on both..