Question about 1994 Chevrolet Astro

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Wiper motor dead? Relay?

The wipers completely shutdown while driving friday. I went to the local recycle shop purchased another, unfortunately installed it and it didn't work. I tested the plug for power throughout the variable settings and power appears to be at the plug. I wondered if you could give me the voltages from the plug and if there was a relay the may be located in the fuse panel. 94 astro van

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Should be 12volts on hi- if your getting power to the plug then your relay is working- very possible that your recycled motor is also junk.

Posted on May 25, 2009

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I have a 2009 gmc sierra, where is the wiper relay location.


The PCB wiper relays are soldered directly to circuit board inside the under hood fuse box.
The windshield wiper/washer switch signal circuits are inputs to the body control module (BCM) and the BCM controls wiper motor low speed operation, washer pump and high speed operation. The windshield wiper/washer switch is provided a low reference from the BCM and each of the switch signal circuits is supplied 12 volts through a resistor and monitored within the BCM. During LOW or INTERMITTENT operation the wiper switch low signal circuit is closed to the low reference circuit through a series of resistors within the switch assembly and the signal circuit voltage monitored by the BCM will depend on the switch contact location to the resistor assembly. During HIGH or WASH operation the high and wash switch signal circuits are closed directly to the low reference circuit within the switch assembly and nearly all the signal circuit voltage will be dropped across the BCM resistors. The BCM controls the wiper motor through the WIPER CONTROL PCB Relay and the WIPER SPEED PCB Relay. During any wiper motor function that uses low speed the BCM supplies the voltage to energize the WIPER CONTROL PCB Relay and battery voltage will be supplied from the WIPER CONTROL PCB Relay through the de-energized WIPER SPEED PCB Relay to the wiper motor low speed control circuit. During high speed wiper motor operation the WIPER CONTROL PCB Relay is energized as in low speed and the BCM provides a ground to energize the WIPER SPEED PCB Relay and the battery voltage is supplied to the wiper motor high speed control circuit. Wiper motor park operation is controlled by the BCM using an input from the park switch within the wiper motor assembly. The BCM supplies the park switch signal circuit 12 volts through a resistor then monitors the circuit. Whenever the wiper motor is out of the park position the park switch signal circuit is closed to ground and nearly all the signal circuit voltage will be dropped across the BCM resistor. When the wiper switch is turned to the OFF position while the wiper motor is somewhere in mid-cycle, the BCM will continue to operate the motor until the wipers reach the park position. If the ignition is turned OFF while the wipers are in mid-cycle, the wipers will stop immediately where they are and the BCM will park the wipers the next time the ignition is cycled ON.

DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3875 00: Wiper High Speed Relay Circuit
DTC B3922 00: Front Wiper Function Select Circuit
Have it checked for DTC'S - diagnostic trouble codes .

The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.
The BCM controls the windshield wiper motor through two output controls, controlling two relays which determine the desired wiper speed, high or low.
Your best bet , take your vehicle to a qualified repair shop or dealer . Hooking up a factory scan tool to see what the wiper switch inputs to the BCM are correct and outputs to relays are good .

Feb 11, 2017 | GMC Cars & Trucks

1 Answer

99 f350 super duty, wipers would only come on sometimes. I changed wiper motor now they still don't work


The generic electronic module (GEM) responds to the windshield wiper control commands by interpreting inputs from the steering column multi-function switch. The speed dependent wipers will compensate for the extra moisture that accumulates on the windshield at higher speeds, except when the multi-function switch is in the INT 1 position. At higher speeds, the speed dependent feature shortens the delay between wipes when using the variable interval wipers. Delays will automatically adjust at speeds between 16 and 105 km/h (10 and 65 mph).
Testing should be done before replacing any parts . And if you don't know about (GEM) Control module controlled system's your best bet , take it to a qualified repair shop . The first place to start trouble shooting these systems is with a scan tool that can read GEM module codes .

B1840 Wiper Front Power Circuit Failure GEM GO to Pinpoint Test B . B1476 Wiper High Speed Circuit Motor Failure GEM GO to Pinpoint Test B . B1473 Wiper Low Speed Circuit Motor Failure GEM GO to Pinpoint Test B .
B1431 Wiper Brake/Run Relay Circuit Failure GEM GO to Pinpoint Test B . B1432 Wiper Brake/Run Relay Circuit Short to Battery GEM GO to Pinpoint Test B . B1434 Wiper Hi/Low Speed Relay Coil Circuit Failure GEM GO to Pinpoint Test D . B1436 Wiper Hi/Low Speed Relay Coil Circuit Short to Battery GEM GO to Pinpoint Test D . B1438 Wiper Mode Select Switch Circuit Failure GEM GO to Pinpoint Test B . B1441 Wiper Mode Select Switch Circuit Short to Ground GEM GO to Pinpoint Test C . B1446 Wiper Park Sense Circuit Failure GEM GO to Pinpoint Test B . B1450 Wiper Wash/Delay Switch Circuit Failure GEM GO to Pinpoint Test E . B1453 Wiper Wash/Delay Switch Circuit Short to Ground GEM GO to Pinpoint Test C . B1458 Wiper Washer Pump Motor Relay Circuit Failure GEM GO to Pinpoint Test F . B1460 Wiper Washer Pump Motor Relay Coil Circuit Short to Battery GEM GO to Pinpoint Test F .
If no codes are stored then you go here .
  • The Wipers Are Inoperative
  • Fuse(s).
  • Circuitry.
  • GEM.
  • Multi-function switch (13K359) (wiper/washer switch).
  • Windshield wiper run/park relay.
  • Windshield wiper HI/LO relay.
  • Windshield wiper motor (17508).
  • GO to Pinpoint Test B .

Your best bet , take it to a qualified repair shop that knows how to trouble shoot problems like this . This is no easy diagnose's .

Feb 07, 2017 | Cars & Trucks

1 Answer

I'm driving in rain, wipers working good, all of a sudden they quit! I drive for 15 min, check again, they work for a while, then quit again...what in the problem?


If your not familiar with automotive electronics an module control of components , I suggest you take it to the dealer . They have the tools to diagnose this type problem !
The Wiper/Washer System consists of the following components:
?€¢
Windshield wiper/washer switch


?€¢
Body control module (BCM)


?€¢
Wiper PCB relay


?€¢
Wiper high PCB relay


?€¢
Windshield wiper motor


?€¢
Windshield washer fluid pump


?€¢
Windshield washer fluid level switch


?€¢
WPR fuse 25 A


?€¢
WSW fuse 10 A


Low Speed Operation
When the wiper switch is in the low speed position, ground is applied through the switch internal resistor and the wiper switch low signal circuit to the body control module (BCM). In response to this signal, the BCM energizes the WIPER PCB relay by applying battery voltage through the wiper relay control circuit to the coil side of the relay. This allows battery positive voltage from the WPR fuse to flow through the switch input side of the WIPER PCB relay and out to the switch input side of the WIPER HIGH PCB relay. Since the wiper high relay is de-energized and its switch contacts are normally closed to the low speed control circuit of the windshield wiper motor, the motor will operate at low speed.
High Speed Operation When the wiper switch is in the high speed position, ground is applied through the windshield wiper switch high signal circuit to the body control module (BCM) indicating the wiper high speed request. In response to this signal, the BCM then energizes the wiper PCB relay, as stated above, and the wiper high PCB relay by applying ground through the control circuit to the coil side of the relay. With the wiper high relay energized and its switch contacts closed to the high speed control circuit of the wiper motor, the motor will operate at high speed.
Wiper motor high speed operation and the wiper high speed PCB relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References.
DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3875 00: Wiper High Speed Relay Circuit
DTC B3922 00: Front Wiper Function Select Circuit
You could Have a switch problem , BCM problem ,PCB relay problem , the pcb relays are non serviceable an the whole under hood fuse box would need to be replaced . Malfunctioning motor bad ground some where etc.....

Dec 20, 2015 | 2008 Chevrolet Impala

1 Answer

Wiper relay location


sounds like wiper motor is "burned" internally - shorted to ground - need to replace- get one from a recycler(junk yard)

Dec 22, 2013 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

How to remove the windshield cowl on a 2002 tyota yaris


It can be faulty wiper motor or blown wiper control fuse.


Do you hear any kind of noise when you starter the wiper function. If yes then fuse is ok, but issue is wiper motor.

If no movement at all and no noise then its blown fuse or shorted/loose wiper control wiring:-----

For complete troubleshooting i suggest you few helpful links with accurate solutions.

-------------

Click the link below:-------


Complete wiper components replacing details ?

http://repairhelpcenter.blogspot.com/2011/11/complete-wiper-components-replacing.html

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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

------------

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

----------

How does cars Windshield Wiper System Works

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

---------

1997 Honda Protege: Replace Wiper Transmission?

http://technoanswers.blogspot.in/2012/06/1997-honda-protege-replace-wiper.html

----------------

Windshield wiper fluid container leaking?

http://whatisbyme.blogspot.in/2012/05/windshield-wiper-fluid-container.html

-----------------

Where is wiper fuse located on1993 chevrolet suburban

http://technoanswers.blogspot.in/2012/02/where-is-wiper-fuse-located-on1993.html

------------

2002 Toyota Sienna: Wipers and Passenger side Power window stopped working?

http://technoanswers.blogspot.in/2012/04/2002-toyota-sienna-wipers-and-passenger.html

-------------


These details will help.

Thanks.

Nov 28, 2012 | Toyota Yaris Cars & Trucks

1 Answer

The wipers on my c5 wont come on


For wipers not working problem,i suggest you to go through the help links.Click the link below and follow the troubleshooting procedure :-----
How does cars Windshield Wiper System Works

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

-------------
How to Replace a Windshield Wiper Motor

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

-----------
Wipers not working, but hear relay click? 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

----------

Complete wiper components replacing details? http://repairhelpcenter.blogspot.com/2011/11/complete-wiper-components-replacing.html

----------

This will help.Thanks.

Feb 16, 2012 | Cars & Trucks

3 Answers

Front wipers will not operate. checked fuse and relay look ok. back wiper works


Here are a few other things to check beside the fuse and relay:

Check Wiper Motor - the wiper motor is the driving force of the windshield wiper. Feel the motor and listen to a humming sound. If there is no humming, the motor is the problem. Check if the motor is working properly and see to it that its electrical connections are made properly. If you find that the motor is dead and beyond repair, get it replaced immediately.

Check For Break in Connecting Wires - the connecting wires of the motor sometimes go loose and that may cause the windshield wipers to stop working. Also check the battery plug connection which the motor has. Connecting the loose wires properly or fixing/replacing the plug might solve your problem.

Check Wiper Switch - another wiper assembly part that can malfunction is the wiper switch itself. Check for switch malfunction and if you find that is indeed the problem, get it replaced from a mechanic.

Check for Bent Wiper Arms - bent wiper arms can cause the operation of the wipers to be hampered. If the wiper arms are bent beyond repair, get them replaced immediately.

Nov 25, 2010 | 2003 Isuzu Ascender

2 Answers

Front wipers have stopped working! back wiper still working


If the motor works when the wiper stalk is moved, but the wipers do not move then the retaining nuts for the wiper arms may be lose., but the motor doesn't work then check the front wiper relay if its relay is work then u have to change the wiper motor sorry.

Jan 02, 2010 | 2002 Volkswagen Golf

1 Answer

BMW 740IL Wiper Issue


try checking for a short to power on ur 12 volt comming into motor also check for a good ground at the plug for ur wiper motor

Jun 16, 2008 | BMW 750 Cars & Trucks

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