Where is the wiper motor?

If the windshield wipers on your 2002 Corvette won't shut off, it could indicate a problem with the wiper control switch or a malfunction in the wiper motor circuit. Here are some troubleshooting steps you can try:

1. Check the wiper control switch: Ensure that the wiper control switch is in the "Off" position. Sometimes, the switch can get stuck or malfunction, causing the wipers to stay on. Try moving the switch back and forth a few times to see if that resolves the issue.
2. Inspect the wiper motor relay: The wiper motor relay controls the power supply to the wiper motor. If the relay gets stuck or fails, it can cause the wipers to stay on. Locate the wiper motor relay in the fuse box or relay panel and try replacing it with a known working relay of the same type to see if that resolves the issue.
3. Check the wiper motor circuit: The wiper motor circuit may have a short or an electrical problem that is keeping the wipers engaged. Inspect the wiring harness connected to the wiper motor for any signs of damage or loose connections. Use a multimeter to check for continuity and proper voltage in the circuit. If you are not familiar with automotive electrical systems, it is advisable to consult a professional technician or a qualified electrician.
4. Disconnect the battery: As a temporary solution, you can disconnect the negative terminal of the car battery to stop the wipers from running. This will disable other electrical components as well, so it's recommended as a temporary measure until the issue can be properly diagnosed and repaired.

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

..

Wiper/Washer System Components
The Wiper/Washer System consists of the following electrical components:
• Accessory relay
• Heated washer nozzles w/XA7
• WASH NOZ 10A fuse
• Windshield washer fluid level switch
• Windshield washer pump motor
• Windshield wiper motor
• Windshield wiper motor module
• Windshield wiper/washer switch
• Wiper/washer switch 10A fuse
• Wiper motor 30A fuse

Wiper/Washer System Operation
The windshield wiper motor module is part of the windshield wiper motor cover and controls wiper motor operation. The accessory voltage supply circuit to the windshield wiper motor assembly is used to operate the wiper motor in all modes. The windshield wiper motor is a 2 speed motor and is operated at low speed in all modes except HIGH. The accessory voltage supply circuit to the windshield wiper/washer switch is used to supply the windshield wiper switch signal circuits. The windshield wiper switch signal circuit voltage levels to the wiper motor module determine the wiper motor operating mode.
When the wiper/washer switch is in the LOW position voltage is supplied through a 24K ohm resistor within the switch to the windshield wiper switch signal 2 circuit, and accessory voltage is supplied to the windshield wiper switch signal 1 circuit. The reduced voltage from the wiper switch signal 2 circuit and accessory voltage from the wiper switch signal 1 circuit causes the wiper motor module to close the wiper motor accessory voltage supply circuit to the wiper motor low speed terminal.

Hi there:
Isnt a diagram but If you have removed the motor, here is the motor installation procedure....

INSTALLATION PROCEDURE



Align the wiper motor to the wiper drive system module. NOTE: Refer to Fastener Notice in Service Precautions.
Install the wiper drive system module to wiper motor screws. Tighten Tighten the wiper drive system module to wiper motor screws to 7 N.m (62 lb in) .
Connect the electrical connector to the wiper motor.
Install the crank arm on the wiper motor.




Rotate the washer solvent container into the installation position.
Install the washer solvent container screws. Tighten Tighten the washer solvent container screws to 6 N.m (53 lb in) .
Inspect the wipers for proper operation.




Also, here is the crank arm procedure...

REMOVAL PROCEDURE

Remove the wiper system module cover.
Remove the drive link from the wiper motor crank arm.

2.1. Loosen the drive link screws.
2.2. Remove the drive link from the wiper motor crank arm.

Remove the wiper motor crank arm cover and seal.
Remove the wiper motor crank arm from the wiper motor.

4.1. Loosen the wiper motor crank arm screw.
4.2. Tap on the wiper motor crank arm screw with a soft-faced mallet while holding up on the wiper motor crank arm until the wiper motor crank arm loosens from the wiper motor.
4.3. Remove the wiper motor crank arm screw and the wiper motor crank arm from the wiper motor.

INSTALLATION PROCEDURE




Install the wiper motor crank arm onto the wiper motor.

1.1. Turn the ignition switch to the ACCY position.
1.2. Set the wiper switch to PULSE position. The wiper motor should be operating.
1.3. Turn the ignition switch to OFF when the wiper motor is in the innerwipe position.

IMPORTANT: Do not rotate the wiper motor shaft during the installation of the wiper motor crank arm.

1.4. Install the wiper motor crank arm on the wiper motor while maintaining a 4-8 mm (0.157-0.315 in) gap between the V-grove in the wiper motor crank arm and the tab.

NOTE: Refer to Fastener Notice in Service Precautions.

Install the wiper motor crank arm screw. Tighten Tighten the wiper motor crank arm screw to 16 N.m (12 lb ft) .
Install the wiper motor crank arm cover and seal.




Check the gap between the wiper motor crank arm and tab. If the gap is not 4-8 mm (0.157-0.315 in) , remove the wiper motor crank arm and repeat installation steps.
Install the drive link onto the wiper motor crank arm.
Install the drive link screws. Tighten Tighten the drive link screws to 5 N.m (44 lb in) .
Install the wiper system module cover.
Inspect the wipers for proper operation.

Additional procedures: Wiper Motor Module Replacement.

TOOLS REQUIRED
J 39822 Wiper Arm Puller

REMOVAL PROCEDURE

Turn the ignition switch to the ACCY position.
Set wiper switch to the PULSE position.
Turn the ignition off when the wiper arms are in the innerwipe position and not moving.
Disconnect the washer hose from the washer nozzle.
Remove the cover from the wiper arm nut.
Remove the wiper arm nut from the wiper transmission drive shaft.
Using J 39822 remove the wiper arm from the wiper transmission.
Remove the wiper blade from the wiper arm.
Clean the knurls of the wiper transmission drive shaft with a wire brush.



Install the wiper blade onto the wiper arm.
Install the wiper arm onto the wiper transmission drive shaft. IMPORTANT: Hold the measuring device at 90 degrees (perpendicular) to the wiper blade tip.
Measure the distance from the wiper blade tip to the solid edge of the windshield blackout. Position the wiper arms at the following distances:

LH - 147 mm (5.79 in) above the glass blackout.
RH - 123 mm (4.84 in) below the glass blackout.

NOTE: Refer to Fastener Notice in Service Precautions.



Install the wiper arm nut onto the wiper transmission drive shaft. Tighten Tighten the wiper arm nut to 48 N.m (35 lb ft) .
Install the cover on the wiper arm nut. IMPORTANT: Lubricate the washer hose with the windshield washer solvent to ease installation on the washer nozzle.
Install the washer hose on the washer nozzle.
Inspect the wipers for proper operation.



Remove the wiper arms from the vehicle.
Remove the air inlet grille panel.
Remove the wiper motor.
Remove the air inlet panel to wiper motor module screws.
Remove the wiper motor module from the vehicle.
Remove the insulators from the wiper motor module.

INSTALLATION PROCEDURE

Install the insulators onto the wiper motor module.
Align the wiper motor module to the air inlet panel. NOTE: Refer to Fastener Notice in Service Precautions.
Install the air inlet panel to wiper motor module screws. Tighten Tighten the air inlet panel to wiper motor module screws to 10 N.m (89 lb in) .
Install the wiper motor.
Install the air inlet grille panel.
Install the wiper arms onto the vehicle.
Inspect the wipers for proper operation.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Wiper Motor

Removal & Installation

1. Disconnect the negative battery cable.
2. Disconnect the wiper motor electrical connector.
3. Remove the four mounting bolts securing the motor to the firewall.
4. Using a suitable prybar, carefully separate the wiper motor from the wiper linkage and remove the motor.

To install:

1. Attach the wiper motor ball joint to the wiper linkage.
2. Position the motor on the firewall and secure the motor with the four mounting bolts. Tighten the mounting bolts to 75 ft. lbs. (102 Nm).
3. Connect the electrical connector.
4. Connect the negative battery cable.

Windshield Wiper Motor Removal & Installation To Remove:
Using the J 39232, remove the wiper transmission from the wiper motor crank arm.

1. Remove the wiper arms
2. Remove the air inlet grille panel.
3. Disconnect the connectors from the wiper motor assembly.
4. Remove the three screws and the wiper drive system module.
5. Using GM special tool J 39232 or equivalent, separate the wiper motor crank arm from the wiper drive ball joint.
6. Remove the wiper motor crank arm from the wiper motor.
   • Remove the rubber boot.
   • Loosen the mounting screw.
   • Tap on the screw with a plastic or leather faced hammer while supporting the wiper motor crank arm.
   • Tap the screw until the crank arm is loose.
   • Remove the screw and crank arm from the motor.
7. Remove the three screws and separate the wiper motor from the module assembly.

To Install:

1. Position the wiper motor on the wiper drive system module assembly. Install the three mounting screws. Tighten the screws to 62 in lb (7 Nm).
2. Install the wiper motor crank arm on the wiper motor.
   • Connect the wiper motor electrical connector.
   • Turn the wiper switch to the accessory position.
   • Turn the wiper switch to the pulse position.
   • Turn the wiper switch off when the wiper motor is in the middle of the wipe cycle.
   • Disconnect the connector from the motor.
   • Maintain a gap of 0.157-0.314 in (4-8 mm) between the wiper motor crank arm and the bracket tab. If the gap is not 0.157-0.314 in (4-8 mm), remove the wiper motor crank arm and repeat installation.
   • Install the mounting screw. Tighten to 142 in lb (16 Nm).
   • Install the rubber boot.
3. Position the wiper drive system module on the vehicle. Install the three mounting screws. Tighten the screws to 68 in lb (10 Nm).
4. Using GM special tool J 39232 or equivalent, connect the wiper motor crank arm to the wiper drive ball joint.
5. Connect the wiper motor assembly electrical connector.
6. Install the air inlet grille panel.
7. Install the wiper arms.
8. Check the windshield wiper operation.

---

CHECK FUSE IF FUSE GOOD.HOOK A JUMPER WIRE TO GROUND AND GROUND WIPER MOTOR.TURN WIPER SWITCH ON IF WIPERS WORKS YOU HAVE TO FIX GROUND CONNECTION. IF WIPER STILL DONT WORK.REMOVE THE COWL COVER.TURN WIPER SWITCH ON TO SEE IF POWER GOING TO WIPER MOTOR IF YES.REMOVE WIPER MOTOR HOTWIRE IT.IF WIPER MOTOR DONT WORK REPLACE IT.IF WIPER MOTOR DO WORK CHECK FOR BINDING OR DAMAGE LINKAGES.IF POWER NOT GOING TO WIPER MOTOR AND FUSE GOOD.WIPER SWITCH FAULTY OR IT HAS BROKEN WIRE FROM SWITCH TO WIPER MOTOR.

with the key on and the wiper switch in the low or high position tap the wiper motor with a screwdriver handle. If it starts working replace the wiper motor.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Could be anything but based on experience the probability points to the self cancelling switching in the motor gearbox.

Front Wiper Motor Removal & Installation

NOTE A new wiper motor assembly comes with the linkage arm installed.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Remove the windshield wiper mounting arm and pivot shaft
   WARNING Do not remove the wiper motor linkage arm from the wiper motor assembly. If the arm is removed, the wiper arms may not park in the correct location.
   NOTE Use a suitable tool to separate the wiper linkage arm from the wiper mounting arm and pivot shaft assembly.
   
3. Remove the 3 bolts and the wiper motor.
   
   
   
   Fig. Wiper motor and linkage
   

To install:

1. Install wiper motor and bolts.
2. Tighten wiper motor bolts to 10 ft. lbs. (13 Nm).
3. Install windshield wiper mounting arm and pivot shaft.
4. Check wiper operation.

Rear Wiper Motor - Removal & Installation

1. Remove the rear pivot arm.
2. Remove the rear wiper motor shaft nut cover
3. Remove the rear wiper motor shaft nut.
4. Open the lift gate window.
5. Remove the rear wiper motor cover trim panel.
6. Disconnect the electrical connector.
7. Remove the 2 rear window wiper motor nuts
8. Remove the rear window wiper motor.
   
   
   Fig. Rear wiper motor view-2008 model shown, other years similar
   

To install:

1. Install rear wiper motor and tighten mounting nuts to 62 inch lbs. (7 Nm).
2. Reconnect the electrical connector.
3. Install wiper motor cover trim panel.
4. Install rear wiper pivot arm tighten nut to 53 inch lbs. (6 Nm).
5. Install shaft nut cover.
   
6. Check wiper operation.

Good luck (remember rated this post).