How to replace a 99 se Bonneville windshield wiper motor

Just replacing parts isn't the way to find the problem , viewing wiring diagrams an testing the electrical circuit with a DVOM - digital volt ohmmeter is . There are no relays involved . Do yourself a favor an take it to a qualified repair shop before you buy more parts that are not needed .

REMOVAL

1. Raise and support the hood.
2. Remove the windshield wiper pivot arms.
3. Remove the cowl top vent panels.

1. Disconnect the windshield wiper mounting arm and pivot shaft.

1. Remove the access cover from the dash panel.
2. Remove the mounting arm and pivot shaft retaining clip.
3. Disconnect the windshield wiper mounting arm and pivot shaft from the windshield wiper motor.

1. Remove the windshield wiper motor.

1. Disconnect the electrical connector.
2. Remove the three bolts.
3. Remove the windshield wiper motor.

INSTALLATION

1. Install the mounting arm and pivot shaft retaining clip on the windshield wiper mounting arm and pivot shaft.

1. Install the windshield wiper motor.

1. Place the windshield wiper motor in the dash panel.
2. Install the three retaining bolts.
3. Reconnect the electrical connector.

1. Reconnect the windshield wiper mounting arm and pivot shaft.

1. Press on the windshield wiper mounting arm and pivot shaft after it is aligned with the windshield wiper motor.
2. Install the access cover in the dash panel.

1. Install the cowl top vent panels.
2. Install the windshield wiper pivot arms.
3. Adjust the windshield wiper pivot arms.

This is technically for the V6 4.2L but I'm sure those Ford E250's have the same setup for windshield wiper motor. Let me know how it goes.

It can be faulty wiper controlling switch or the wiper switch wires are shorting.

There are few solved solution help links related to wiper problem on various car brands and models.Select the required links and go through its troubleshooting procedure.
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1993 Ford F350 wipers not working?

http://repairhelpcenter.blogspot.in/2012/02/1993-ford-f350-wipers-not-working.html
--------- How to Replace a Windshield Wiper Motor

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-windshield-wiper-motor.html

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Wipers not working, but hear relay click on Lincoln LS? http://schematicsdiagram.blogspot.com/2011/12/wipers-not-workingbut-hear-relay-click.html
--------- Car windshield wiper gets power for movement and stops?

http://schematicsdiagram.blogspot.com/2011/12/car-windshield-wiper-gets-power-for.html

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How does cars Windshield Wiper System Works

http://technoanswers.blogspot.com/2011/11/how-does-cars-windshield-wiper-system.html

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1997 Honda Protege: Replace Wiper Transmission? http://technoanswers.blogspot.in/2012/06/1997-honda-protege-replace-wiper.html

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For more help,keep updated.
Thanks.

The windshield wipers don't work at all or you can hear the motor running but the wiper arms do not move?

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

this tricky cause both ur wiper stalk and wiper mafuctioning can cause this ur wiper motor has a pulse board on it probrably be first thing to replace check out rockauto.com theyre the best and cheapest on parts

wiper module failures are common its mounted on the front of your wiper motor has a circut board that slides in ? sometimes the motor itself shorts out the board i would just replace the whole motor with a rebuilt unit ?

try replaceing the circut board in the motor

SECTION 501-16: Wipers and Washers 1999 Town Car Workshop Manual REMOVAL AND INSTALLATION Mounting Arm and Pivot Shaft Removal

1. Disconnect the battery ground cable (14301).

1. Remove the windshield wiper pivot arms (17527).
   1. Remove the nuts (one each side).
   1. Remove the windshield wiper pivot arms.

1. Remove the LH and RH cowl top vent panels.
   1. Remove the hood weatherstrip.
   1. Remove the screws.
   1. Remove the retaining clips.
      • Disconnect the LH and RH washer hoses.

1. Position the windshield wiper mounting arm and pivot shaft (17566) assembly aside.
   1. Remove the nuts.
   1. Remove the bolt.
   1. Position the windshield wiper mounting arm and pivot shaft assembly aside.

1. Remove the windshield wiper mounting arm and pivot shaft assembly.
   1. Disconnect the electrical connector.
   1. Remove the windshield wiper mounting arm and pivot shaft assembly.

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Motor —Windshield Wiper Removal

1. Remove the windshield wiper mounting arm and pivot shaft (17566) assembly; refer to Mounting Arm and Pivot Shaft .

1. Remove the windshield wiper motor (17508).
   1. Remove the output shaft bolt.
   1. Remove the bolts.
   1. Remove the windshield wiper motor.

if you had your windshield replaced they may not have been put back on in the proper location

the "horizontal park" mechanism is in the actual wiper motor assy.