What is the actual problem you are having with the pulse? I imagine that if your wipers are on constantly, you can't tell if the pulse is working, right?
The wiper switch is in a very bad place... Here's a thread documenting how you have to open up the column in order to replace it. Once you've gotten to this point, I've listed the procedure in step 21C. How-To; Steering Column Repair
The wiper switch is quite possibly one of the biggest PITA parts I've ever had to replace. Its easily a 4-6 hour job for a first-timer. The part itself is also really expensive.
The connector for the switch is easily accessible at the base of the column. You should be able to test the switch there to see if its remaining open all the time and also test the pulse signals. You'll just need a wiring diagram to trace the wires.
BTW - The pulse lever is attached to a sleeve that rotates around the turn signal lever. Rotating the turn signal lever turns the wiper switch in the column, and the rotating sleeve engages the pulse part of the assembly, which is just another switch wrapped around the one for the wiper - all packaged in the same assembly.