Done alot of reading on the wiring of the windshield wiper system. Coolermans write-ups are good. I have followed all advice given and still can't isolate my problem. So I must be missing something. What I have is a 74 FJ40. Everything electrical works except for the wiper system. As soon as I turn the key on the fuse blows. Thought it was a faulty switch, motor etc. So I have disconnected everything. Switch is disconnected. Disconnected the harness that comes from the windshield to the connectors under the dash. Still same problem. Beginning to think I have a problem in my fuse block. I am getting a good ground and good continuity through all the wires. I am getting 12V to the fuse block (blue/red wire). Think I have explained everything. Let me know what I am missing please, Thanks Dan.