dont work on my 72 240z every time i flip the switch it makes a clicking noise what can i do to fix this?

Check the attachment points on the wiper arms-with the wipers on. you probably have either a non functioning motor, or more probably stripped splines on the drive shafts the arms bolt to-or a worn out motor attachment.

Will

Or simpler yet, a retaining nut on the main wiper linkage that fell off. Still have to remove the cowl to find out though.

E

what 'E said...

Will

If you need a new motor look on ebay. '72 is a "difficult" year to find because it only has... 5 prongs I think? Everything else past '72 has one more because of the added intermediate speed I think. Don't bother sending it in to be rebuilt because the ones that do pop up on ebay are for like $15. I paid $40 for mine but had been looking for 2 months while driving the car un-inspected and such...

But yah I'd look for the nut that goes from the arms to the motor. It's probably just the rectangular shaft spinning and not catching the attach point. Buy that nut at the hardware store, forgot what size though.