versanissan

Hi all- I need a litttle help on this... I have a early 74 260z with a GTO body and an LT1 engine that I built in 1986. My wipers stopped working 24+ years ago. I finally decided I would try to fix it... The fuse keeps popping on it. If I put in a new fuse, I can hear a relay popping on and off until the fuse blew. I pulled the wiper motor out to see what was what... The clicking is a small relay attached to the wiper motor. I direct wired the motor (bypassing the relay)by using my power probe to apply power to different wires. I can get it to run on the high speed and low speed circuit with no problem so I know the motor is good. After lubricating all the hinge points i plugged it back in to it's normal wire harness location and installed a new fuse. The relay started up again (without putting power to the wiper switch) and popped the fuse in a about a minute. Does this sound familiar to anyone or ring a bell as to what is going on. Versanissan in Sonoma, Ca.