Wheres the circuit board for a windshield wiper

1988 to 1996 should be pretty much the same. A very common issue with these years are the printed circuit board on the wiper motor itself.

Question edited for clarity. Part of duplicate question added.
Duplicate question deleted.
Question moved to model category.

This says Pulse Board or the Switch

https://www.google.com/search?q=2004+Pontiac+Montana+front+wipers+won%27t+turn+off

This says it does have a relay... but

https://www.google.com/search?q=2004+Pontiac+Montana+wiper+relay

Nothing shows where it is located.

https://www.google.com/search?q=2004+Pontiac+Montana+wiper+relay+location

Relay here

https://www.autozone.com/electrical-and-lighting/wiper-motor-relay

It may not be releasing, you can test if you can find it!

https://www.autozone.com/electrical-and-lighting/wiper-motor-relay

..

Change the wiper motor, and you replace the pulse board.. You can not buy the board separate from the motor.

wiper motor bad washer pump is part of wiper motor you pick a good one up at a junk yard for around $35.00

Hello my name is Ben. The pulse board is in the wiper control module, which is mounted directly onto the wiper motor.

I don't believe there is a recall but I've replaced a lot of the wiper control modules [glorified circuit board] on top of the wiper motor for similar problems. Something in the circuit board goes bad and causes the wipers to malfunction randomly. There are other things that can cause wipers not to work but I'd look there first

Wiper motor circuit board is the problem.

First remove the wiper arms.Then remove the screws that hold the black plastic grill, you will see the motor.You will need then to disconnect the wiper arm transmission linkage from the motor, then remove the three bolts holding the motor on, dont't forget to disconnect the electrical connector from the motor.Install in reverse order.Good luck.

add a ground wire to the side of the wipermotor on the side with no rubber mounts.

Fixed the wiper problem which was identical to Brad's by changing out the wiper module which is also called a pulse module or something of that nature. Pretty easy fix. You have to remove the grill that the wiper blades protrudes from in order to get to the motor (4 clips in front which can be removed by hand, remove radio antenna, a center push down retainer, two plastic end caps which pop off and then 1 star type screw on each end under the end caps). Getting the blades off seemed difficult. I used a small puller to pop them off after removing the nuts.

You can't buy this module at a regular parts store. I had to get it from the dealer so be prepared to spend $130 to $140 for the part or go to the salvage yard. Works great now.