Recently fixed the same problem on '88 wagon. Attached to the bottom of the washer reservoir are two identical pumps. Sedans have one. They are easy to remove and repair on the work bench. Disassemble pump bottom portion to clean out hardened minerals and soap residue, lightly smooth surfaces with fine wet/dry sandpaper where needed, a little wd-40 worked in, then put it back together. Good as new and free!