Do the wipers work ? Fuse for wipers is same as washer pump .
Principles of Operation
The wiper motors receive inputs from the following:
- Multi-function switch
- Powertrain control module (PCM)
- Ignition switch
- Smart junction box (SJB)
The following components are integrated in the wiper motors:
- Windshield wiper motor module
- High/low speed relay
- Run/park relay
- Washer pump relay
- Park sense (Hall-effect sensor)
Washer System
The windshield washer and the rear window washer are activated by the internal wiper motor modules when it receives a ground from the multi-function switch between the washer inputs. Depending on the correct ground, the internal wiper motor modules activate either the windshield washer or rear window washer relays (internal) by grounding the respective relay coil. When either module is activated, it connects voltage to the washer pump while the deactivated module provides ground to the washer pump. In this manner, voltage polarity is reversible to achieve directional change of the washer pump and washer fluid.
- The washer pump is inoperative
- Circuitry
- Washer pump
- Multi-function switch
- Windshield wiper motor
- Rear window wiper motor
Does your expedition have programmable/recall memory option for seats an mirrors ?
Driver Seat Module
The power driver seat and power exterior mirrors are controlled by the driver seat module (DSM) only when the vehicle is equipped with the programmable/recall memory option.
On the Expedition Limited, the power fold exterior mirror option is controlled by the DSM. Before running a self-test or retrieving codes, the power fold switch must be inactive for at least 30 seconds.
This is a complex vehicle , electronics , control modules an serial data communication networks. You mite be better off taking it to the dealer or some other repair shop . There could be DTC'S - diagnostic trouble codes stored in the SJB - body control module !
B1667
Mirror Driver Up/Down Motor Stalled
Go To Pinpoint Test D .
B1668
Mirror Driver Right/Left Motor Stalled
Go To Pinpoint Test D .
B1669
Mirror Passenger Up/Down Motor Stalled
Go To Pinpoint Test D .
B1670
Mirror Passenger Right/Left Motor Stalled
Go To Pinpoint Test D .
B1735
Mirror Driver Vertical Switch Circuit Short to Battery
Go To Pinpoint Test D .
B1739
Mirror Driver Horizontal Switch Circuit Short to Battery
Go To Pinpoint Test D .
B1743
Mirror Passenger Vertical Switch Circuit Short to Battery
Go To Pinpoint Test D .
B1747
Mirror Passenger Horizontal Switch Circuit Short to Battery
Go To Pinpoint Test D .
B2312
Mirror Horizontal Feedback Potentiometer Circuit Failure
Go To Pinpoint Test D .
B2314
Mirror Passenger Horizontal Feedback Potentiometer Circuit Short to Battery
Go To Pinpoint Test D .
B2316
Mirror Passenger Vertical Feedback Potentiometer Circuit Failure
Go To Pinpoint Test D .
B2318
Mirror Passenger Vertical Feedback Potentiometer Circuit Short to Battery
Go To Pinpoint Test D .
B2320
Mirror Driver Horizontal Feedback Potentiometer Circuit Failure
Go To Pinpoint Test D .
B2322
Mirror Driver Horizontal Feedback Potentiometer Circuit Short to Battery
Go To Pinpoint Test D .
Normal Operation
During normal operation, when the front wiper wash is selected, the windshield wiper motor provides power to the washer pump through circuit CRW14 (BU/WH) and ground is provided to the washer pump through circuit CRW12 (GY/OG) and the rear wiper motor. If rear wiper wash is selected, the rear wiper motor provides power to the washer pump through circuit CRW12 (GY/OG) and ground is provided to the washer pump through circuit CRW14 (BU/WH) and the windshield wiper motor.
Possible Causes
- Multi-function switch
- Open in circuit CRW14 (BU/WH), CRW12 (GY/OG), CRW07 (GY/BN), CRW20 (GY/YE), SBB49 (RD) or GD149 (BK/GY)
- Short to ground in circuit CRW14 (BU/WH), CRW12 (GY/OG), CRW07 (GY/BN) or CRW20 (GY/YE)
- Washer pump
- Windshield wiper motor
- Rear wiper motor
This is
