My windshield wipers won't turn off unless I pull the fuse. The wiperfluid is constantly going too. I'm not sure if I need a new motor or switch.its a 91 fleetwood brougham 5.0 and wiper does have a delay. Its rwd.
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First you need a wiring diagram, free at http://www.bbbind.com/free_tsb.html Then you need a DVOM - digital volt ohm meter to test the circuit . Then if your not familiar with automotive electrical systems testing ,go on youtube an check out Electric Testing Techniques You Need to Know Also having a factory diagnostic trouble shooting chart would also be usefull . You could just start replacing parts , you mite get lucky . The wiper motor is a high fail part , so is the switch ..You could find the fuse is blown ! But fuse's don't usually blow without a reason . Short to ground , low resistance . ( high current flow) Also knowing how they work and what all is involved in making them work.
The Wiper/Washer System consists of the following components:
• Windshield wiper/washer switch
• Windshield wiper motor module
• Windshield wiper motor
• Windshield washer pump motor
• FRT/WPR/WSHR 25A fuse
Wiper/Washer System Operation
The windshield wiper motor module is part of the windshield wiper motor cover and controls wiper motor operation. 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 motor assembly is used to operate the wiper motor in all of the low speed modes. The accessory voltage supply circuit to the windshield wiper/washer switch is used to supply the windshield wiper switch signal circuits and the wiper motor high speed circuit.
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.
Windshield wiper/washer system MIST operation is identical to LOW operation except that the MIST switch is a press and release type. When the wiper switch is moved to the MIST position and released, low speed wiper motor operation is started and will continue until 1 cycle is complete. If the wiper switch is moved to the MIST position and held, the windshield wiper motor will operate in the LOW mode until the switch is released.
Don't the wipers work in any mode ?
Did you review the Wiper/Washer System description and operation and perform the necessary inspections?
YES - Go to Step 2
NO - Go to Symptoms - Wiper/Washer Systems
Turn ON the ignition , with the engine OFF.
Operate the windshield wiper/washer switch through all the switch positions.
Does the windshield wiper/washer system operate normally?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
Turn OFF the ignition.
Disconnect the harness connector of the windshield wiper motor.
Turn the ignition ON, with the engine OFF.
Connect a test lamp from the accessory voltage circuit of the windshield wiper motor to a good ground.
Does the test lamp illuminate?
YES - Go to Step 4
NO - Go to Step 13
Connect a test lamp from the accessory voltage circuit to the ground circuit of the windshield wiper motor.
Does the test lamp illuminate?
YES - Go to Step 5
NO - Go to Step 14
Connect a test lamp from the signal 2 circuit of the windshield wiper switch to a good ground.
Press the windshield washer switch.
Does the test lamp illuminate?
YES - Go to Step 11
NO - Go to Step 6
Let me know if you make it this far and i will send rest of diagnostic's
The windshield wiper motor is a smart wiper motor with an integrated electronics module. The internal components of the motor are the high/low relay, washer pump relay, and the run/park relay and associated electronics.
The windshield wiper motor receives its inputs from the windshield wiper/washer switch. These signals are ground reference signals. When the switch is placed in different positions, various input signals are selected and sent through circuits to the motor. The windshield wiper motor module identifies these selected input signals and activates the motor to the selected function.!
Your probably going to need a new wiper motor ! ! ! But you should always test before replacing parts !
Visual Inspection Chart
Windshield washer pump hoses
Windshield wiper mounting arm and pivot shaft
Bussed electrical center (BEC) fuse 10 (30A)
Smart junction box (SJB) fuse 3 (10A)
Windshield wiper motor
Windshield washer pump
Windshield wiper/washer switch
The wipers stay on continuously
Windshield wiper motor
Windshield wiper/washer switch
Go To Pinpoint Test C .
PINPOINT TEST C: THE WIPERS STAY ON CONTINUOUSLY
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
Result / Action to Take
C1 CHECK THE WINDSHIELD WIPER/WASHER SWITCH
Key in OFF position.
Disconnect: Windshield Wiper/Washer Switch C2137.
Carry out the windshield wiper/washer switch component test.
Refer to Wiring Diagrams Cell 149 for schematic and connector information.
Does the windshield wiper/washer switch pass the component test?
GO to C2 .
INSTALL a new windshield wiper/washer switch. REFER to Wiper/Washer Switch in this section.
C2 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD), AND 63 (RD) FOR A SHORT TO GROUND
Disconnect: Windshield Wiper Motor C125.
Measure the resistance between the windshield wiper motor C125, harness side and ground as follows:
The wiper motor takes its orders from the wiper switch which is probably faulty. It wont take long to ruin your windshield unless you live where it rains constantly. It you're sure it wont rain you can pull the fuse out until you can get it repaired. Probably wont be cheap as it's also probably on a multi function switch. If you have a friend that knows how to install a toggle switch to turn the power on and off to the wiper motor and money is a problem then that's the way I would go. Under $10 solution as opposed to what will probably several hundred $
did you check the fuses? there might be a fuse for the wipers under the hood as well as in the fuse box inside. If its not the fuses then it could be either the windshield wiper motor is burned out or the arm that connects the wipers to the wiper motor may have fallen off or more than likely the joint where the arm from the wiper motor connects to the wipers themselves wore out and came apart that happens alot mostly on older vehicles though, try turning the wipers on high an then listen under the hood you should hear the wiper motor unless its junk but if you hear it then the problem is with where the motor connects to the wipers, if you don't hear anything at all coming from underneath the windshield behind the firewall under the hood then your wiper motor is either junk or theirs a short in the wiring going to the motor or there's a blown fuse you missed somewhere id look in the owners manual just to make sure there's no fuses for the wipers u don't know about, it could also be that the switch on the steering column that you turn to turn the wipers on and off went out im not sure how you'd test that though... if you cant figure it out after you try what i suggested let me know ill try and figure out if there's a way to test the switch.
Principles of Operation
Operation of the windshield wiper and washer is controlled by the front wiper/washer amplifier assembly. The front wiper/washer amplifier input comes from the multifunction switch by means of a voltage divider circuit. A constant voltage is applied to the multifunction switch by the front wiper/washer amplifier. When the multifunction switch is moved into the LO, HI, or intermittent position, the voltage is directed through a series of resistors. This results in various voltages being returned to the module for each switch position. The module then grounds the appropriate circuit, based on the voltage signal received back from the multifunction switch. This causes the wipers to run intermittently, or at the appropriate speed. Voltage is supplied to the wiper motor by the CJB fuse F46 (20A).
When the multifunction switch wash button is depressed, it bypasses all of the resistors returning a full voltage signal to the module. The module then grounds the appropriate circuits to operate the windshield washer pump for as long as the switch is depressed. The windshield wiper speed is dependent on the position of the windshield wiper/washer switch.
Voltage for the windshield washer pump is also provided by CJB fuse F46 (20A).
Operation of the rear wiper and washer is controlled by the rear wiper/washer switch.
Voltage is supplied to the rear window wiper motor by the fuse junction panel fuse F44 (10A).
The rear window wiper motor ground is made or broken by the rear wiper/washer switch. When the rear wiper/washer switch is moved into the WIPER position, it grounds the rear window wiper motor circuit, causing the rear window wiper motor to run once every 10-15 seconds.
Voltage to the rear washer pump motor is also supplied by the CJB fuse F44 (10A). The rear washer pump is directly controlled by the rear wiper/washer switch which makes or breaks the ground for the washer pump motor, depending upon its position.
If the vehicle is equipped with a movable liftgate glass, a liftgate glass switch is utilized to prevent rear window wiper operation when the liftgate glass is open. This same switch also causes the rear window wiper to drop down approximately three inches when the liftgate glass latch is released.
The wipers stay on continuously — rear wiper
Rear wiper/washer switch.
GO to Pinpoint Test L .
Measure the resistance between rear wiper/washer switch C288 pin 6, component side and rear wiper/washer switch C288 pin 2, component side.
Is the resistance less than 5 ohms with the switch depressed, and greater than 10,000 ohms with it released?
GO to L2 . No
INSTALL a new rear wiper/washer switch. TEST the system for normal operation.
Measure the resistance between rear wiper/washer switch C288 pin 6, circuit WB08 (BU/YE), harness side and ground.
Is the resistance greater than 10,000 ohms?
INSTALL a new rear wiper /washer switch. TEST the system for normal operation. No
REPAIR circuit WB08 (BU/YE). TEST the system for normal operation.