Porsche Parts Catalog Porsche Accessories Catalog Porsche Technical Articles Porsche Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Windshield Wiper Motor Replacement
 
Bookmark and Share

Pelican Technical Article:

Windshield Wiper Motor Replacement

Steve Vernon

Time:

3 hours3 hrs

Tab:

$600

Talent:

***

Tools:

13mm wrench, 22mm, 10mm, 8mm socket, Philips head screwdriver

Applicable Models:

Porsche 944 Turbo (1986-89)

Parts Required:

Wiper motor

Hot Tip:

Use care removing the cowl cover

Performance Gain:

Working windshield wipers

Complementary Modification:

Clean out the area around the blower motor

Wiper motors used to last the life of the car. With automobiles lasting longer and longer we are starting to see failure of the wiper motors, especially if the car is in a four-season climate. If your motor is starting to act up or working intermittently, it is a good idea to replace it right away.

Replacing the wiper motor on a Porsche 944 is not a simple job, and not something you should leave until it starts raining to do. You are going to have to remove a fair amount of components to do the job properly. While it is possible to change out the motor without removing the arm assembly, there is a large risk of damaging something in the vehicle including the windshield. When I replaced the motor on the project car, I had to use an impact screwdriver to release the motor mounting screws, which would have been impossible with the assembly in the car.

If you are going to replace your motor, do the job right. Don't take unnecessary short cuts, which might end up costing you more time and money.

Begin by making sure that the wipers are in the "park" position. To do this, simply turn the wipers on and off and they should stop level down at the bottom of the windshield. This is known as the park position. If your wiper motor failed in another position than the park position, you should be able to carefully move them by hand down into the park position.

Before replacing the motor, make sure it is not something as simple as an unplugged connection or faulty fuse.
Figure 1

Before replacing the motor, make sure it is not something as simple as an unplugged connection or faulty fuse. Check your manual for the wiper motor fuse and perform a visual check and use the built in test area (red arrow) to confirm the fuse is good. If you have any doubt, replace the fuse.

Make sure the wipers are in the park or off position and remove the ground cable from the battery (red arrow).
Figure 2

Make sure the wipers are in the park or off position and remove the ground cable from the battery (red arrow). Place the ground cable so it cannot come in accidental contact with the battery post while working.

You are going to have to remove the blower motor and housing to get access to the wiper motor and arm assembly (red arrow).
Figure 3

You are going to have to remove the blower motor and housing to get access to the wiper motor and arm assembly (red arrow). Please see our article on blower motor replacement for additional assistance.

Mark the position of the wiper arms and blades before removing them with masking or painter's tape (red arrows).
Figure 4

Mark the position of the wiper arms and blades before removing them with masking or painter's tape (red arrows).

With the blower motor removed, you should note the position of the arms on the assembly (red arrow).
Figure 5

With the blower motor removed, you should note the position of the arms on the assembly (red arrow). You want to make sure they are in the same position when reassembling.

Remove the caps on the base of the wiper arms and remove the 13mm nut (red arrow).
Figure 6

Remove the caps on the base of the wiper arms and remove the 13mm nut (red arrow).

Wiggle and pull the wiper arm off the base (red arrow).
Figure 7

Wiggle and pull the wiper arm off the base (red arrow). If you live in a four-season climate, you may have to use a small puller to get the arm off of the assembly. Use care working around the windshield. The motor is expensive enough that you don't want to add a new windshield to the bill.

Use a 22mm socket and remove the large nut on the base (red arrow).
Figure 8

Use a 22mm socket and remove the large nut on the base (red arrow).

Each base should have a 22mm nut (red arrow) and plastic gasket (yellow arrow) and a rubber gasket (green arrow).
Figure 9

Each base should have a 22mm nut (red arrow) and plastic gasket (yellow arrow) and a rubber gasket (green arrow).

Follow the wiring from the motor and disconnect it from the connection next to the base of the blower motor housing (red arrow).
Figure 10

Follow the wiring from the motor and disconnect it from the connection next to the base of the blower motor housing (red arrow). Unclip any wires that may be attached to it.

Remove the 10mm nut at the base of the motor (red arrow).
Figure 11

Remove the 10mm nut at the base of the motor (red arrow).

Remove the 10mm nut under the center arm base (red arrow).
Figure 12

Remove the 10mm nut under the center arm base (red arrow).

There will NOT be enough room to easily remove the wiper arm, assembly and motor from the cowl, as the base of the blower assembly is in the way.
Figure 13

There will NOT be enough room to easily remove the wiper arm, assembly and motor from the cowl, as the base of the blower assembly is in the way. A lot of people try and tilt the assembly forward and remove the motor from the assembly at this point. One of the many problems is, is that the motor is secured from underneath. It can take a lot of force to remove the three screws. The 13mm bracket nut can be a pain to get off and lever out. The armature will be in the way. Meaning, you will need to rotate it to get access to the three screws. It is much, much easier to simply remove the six 8mm bolts holding the base of the blower assembly to the chassis (red arrows).

With the six bolts removed, you can gently pry the base up; there is a soft gasket sealing it to the chassis, which you may or may not need to replace depending on how it comes off.
Figure 14

With the six bolts removed, you can gently pry the base up; there is a soft gasket sealing it to the chassis, which you may or may not need to replace depending on how it comes off. Lift the base up and disconnect the vacuum line for the actuators (red arrow).

With the base removed, there is all kinds of room to remove the arm assembly (red arrow).
Figure 15

With the base removed, there is all kinds of room to remove the arm assembly (red arrow). This is also a good time to give this area a good cleaning.

Remove the motor and arm assembly from the vehicle and take it to your workbench.
Figure 16

Remove the motor and arm assembly from the vehicle and take it to your workbench.

This photo illustrates how the armature (red arrow) can block the three screws for the motor mount.
Figure 17

This photo illustrates how the armature (red arrow) can block the three screws for the motor mount. You really do not want to be trying to undo all this upside down in the front of the vehicle.

You can use the 13mm (yellow arrow) nut on the arm bracket to turn the armature and give you access to the three mounting screws (red arrows).
Figure 18

You can use the 13mm (yellow arrow) nut on the arm bracket to turn the armature and give you access to the three mounting screws (red arrows). I had to use an impact screwdriver to loosen the mounting screws.

Brace the armature and remove the 13mm nut and wavy washer (red arrow).
Figure 19

Brace the armature and remove the 13mm nut and wavy washer (red arrow). Depending on the condition of the arm bracket, you may need to gently pry it off or even use a puller to get it to release. Installation is the reverse of removal. Make sure to run the motor once or twice to make sure it is in the park position before installing the wiper arms.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Mon 12/5/2016 02:47:19 AM