Rear wiper stopped but can hear motor working, also hear motor when ignition is turned on

If you can hear the rear wiper motor working but the wiper is sticking and not moving properly, there are several potential reasons for this issue. Here are some steps you can take to troubleshoot and resolve the problem:

1. Check for Obstructions: Inspect the area around the rear wiper blade for any obstructions or debris that might be preventing smooth movement. Clear away any leaves, twigs, or other materials that could be hindering the wiper's motion.
2. Wiper Arm and Blade Inspection: Examine the rear wiper arm and blade for any damage or signs of wear. A damaged wiper arm or blade might be causing the sticking issue. If there are visible issues, consider replacing the wiper blade assembly.
3. Lubricate the Wiper Mechanism: Apply a silicone-based lubricant to the wiper pivot points and joints. This can help reduce friction and facilitate smoother movement. Be cautious not to use excessive lubricant, as it may attract more dirt and debris.
4. Check Wiper Motor Linkage: The wiper motor is connected to the wiper arm by a linkage. Check the linkage for any loose or damaged connections. If the linkage is damaged, it may need to be repaired or replaced.
5. Inspect Wiper Motor Operation: With the rear wiper turned on, observe the movement of the wiper motor linkage. If the motor is working but the linkage isn't moving correctly, there may be an issue with the linkage assembly.
6. Wiper Motor Replacement: If all else fails and the problem persists, the wiper motor itself may be faulty. In such cases, replacing the wiper motor may be necessary.
7. Professional Inspection: If you are unable to identify and resolve the issue on your own, or if the problem is related to internal components, it may be best to seek professional assistance. A mechanic or automotive technician can perform a more detailed inspection and provide a more accurate diagnosis.

Remember to exercise caution when working around moving parts and electrical components. If you're unsure or uncomfortable performing these steps, it's advisable to consult with a professional mechanic or take your vehicle to an authorized service center for further assistance.

Sounds like you might have a bad multifunction switch. You can test the outputs of the switch to confirm.

Rear Wiper/Washer System Components
The rear wiper/washer system consists of the following components:
• Rear wiper/washer switch
• Window wiper module-rear
• Window washer pump-rear
• RR WIPER 15A fuse
• RR WPRB 25A fuse
Rear Wiper/Washer System Operation
The rear wiper module controls rear wiper motor operation. Battery voltage supplied to the module is used to operate the wiper motor in all modes and to return the rear wiper arm to the park position after the ignition is turned off. Accessory voltage supplied to the rear wiper/washer switch is used to supply the rear window wiper and washer switch signal circuits. In wiper switch positions 1 and 2 the wiper switch signal circuit voltage level to the wiper motor module determines the wiper motor delay interval. The rear window washer pump supply voltage circuit is used to provide the operating voltage for the rear washer pump for as long as the rear washer switch is pressed. The rear window washer switch signal circuit is used as a wash signal to the rear wiper motor module to operate the wipers during the rear wash operation.


Did you replace the rear wiper module ?

There is a electric motor that pumps washer fluid . Located in the bottom of the washer fluid tank .
Wash Operation (Front and Rear Wipers)
The front and rear washer systems use the same windshield washer fluid pump. When either the front or rear wiper is in the washer position voltage will be supplied to one side of the windshield washer fluid pump (depending on whether it is front or rear), while the other side of the pump is grounded.
At this point, the windshield washer fluid pump sprays solvent onto the windshield. When the front or rear washer is activated, the BCM receives an input from the switch that is activated. The BCM will control the wipers while in the WASH mode. The BCM will control either the front wiper relay or the rear wiper relay to turn on the wipers. The windshield wipers operate at low speed for 3 swipes and returns to the park position.

When turning on the washers do you hear the motor run ? Have some one try it while you listen at the washer fluid tank ! These pump motors do go bad .
turn OFF the ignition.
Disconnect the harness electrical connector of the windshield washer fluid pump.
Connect a test lamp from the windshield washer pump control circuit to a good ground .
Turn ON the ignition, with the engine OFF.
Press the front washer switch.
Does the test lamp illuminate?
YES or NO !

Can you move the wiper by hand ? Which does your vehicle have ?
WDA/Z88 The rear wiper is controlled based on an input from the rear wiper/washer portion of the multifunction switch. When closed, the wiper ON and wiper DELAY switches provide a unique voltage signal to the rear window wiper motor indicating the desired speed. Each switch has a unique resistor that drops the voltage to a specified value which is interpreted by the rear window wiper motor as ON or DELAY. The rear wiper motor receives B+ voltage from the I/P fuse block and accessory voltage from the body control module (BCM).
W49 The rear wiper is controlled based on an input from the rear wiper/washer switch. When closed, the wiper ON switch provides a voltage signal to the rear window wiper motor indicating rear wiper operation is requested. The rear wiper motor receives B+ voltage from the I/P fuse block and accessory voltage from the body control module (BCM).
Do you know how to do electrical testing ?
WDA/Z88

1. Ignition OFF, disconnect the harness connector X1 at the multifunction switch.
2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 4 and ground.
?‡'
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to Power Mode Mismatch.

3. Ignition OFF, connect the harness connector at the multifunction switch. Disconnect the harness connector at the rear window wiper motor.
4. Test for less than 20 ohms between the ground circuit terminal B and ground.
?‡'
If greater than the specified range, test the ground circuit for an open/high resistance.

5. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.
?‡'
If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

6. Verify a test lamp illuminates between the ignition circuit terminal E and ground.
?‡'
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

7. Rear wiper switch in the ON position, test for B+ between the signal circuit terminal D and ground.
?‡'
If less than the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, test or replace the multifunction switch.

8. Rear wiper switch in the DELAY position, test for B+ between the signal circuit terminal D and ground.
?‡'
If less than the specified value, test or replace the multifunction switch.

9. If all circuits test normal, test or replace the rear window wiper motor.

W49

1. Ignition OFF, disconnect the harness connector at the rear wiper switch.
2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 6 and ground.
?‡'
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to Power Mode Mismatch.

3. Ignition OFF, connect the harness connector at the rear wiper switch. Disconnect the harness connector at the rear window wiper motor.
4. Test for less than 20 ohms between the ground circuit terminal B and ground.
?‡'
If greater than the specified range, test the ground circuit for an open/high resistance.

5. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.
?‡'
If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

6. Verify a test lamp illuminates between the ignition circuit terminal E and ground.
?‡'
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

7. Rear wiper switch in the ON position, verify a test lamp illuminates between the signal circuit terminal D and ground.
?‡'
If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the I/P switch assembly.

8. If all circuits test normal, test or replace the rear window wiper motor.

Component Testing

Do you know how

sounds like the turn signal switch is shorting out needs to be replaced.

Sounds like a problem within the wiper motor not turning off at rest or not reaching it's rest point to be able to turn itself off, probably needs a new motor. Disconnecting it should have no relation to the front washer operation, you can confirm this by reconnecting the wiper motor to try.

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Sorry I cant offer any soloution but I do have the Same Problem :( I know its a long time ago but did you find the answer to fix the problem? Would love to Know :)

Kind regards
Ian

my 2004 expedition had same problem, if you take apart the shaft that goes thru the glass it will be full of dirt, clean ,lubricate and reinstall, you may have to replace the O-ring on the shaft. a 20 minute job, very easy fix

My 2005 Ford FreeStyle (AWD) Front wipers quit working...don't even hear a sound of the motor attempting to operate...wiper washer/sprayer operates fine. Rear wiper system operates.
What is wrong? Do I need replace the wiper motor? If so,how? Thanx