I've got a 91 accord.

The wipers won't stop. If the switch click softly from low-immed-high, it will perform ok until it hits the sweet spot then it stay running even in off position. It take 1 click on the mist and it won't stop running either, same as turning the low-immed-high position quickly.
I have replaced motor, switch, and integrated control unit. Same problem. I have read others with same issue, but most seem to have luck replaced parts i mentioned. So is the problem lie in the harness? Ground? Which end do i start? It is not fun looking at the wire bundles. ATM the icu is disconnected so the wiper can be use.

 

if it was my car I would run a toggle switch to cut the power going to the motor when you do not want the wipers on.

As you probably know it is easy to find the power wire going to the motor on the window cowl.