Question about 1994 GMC Sierra

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Wipers still dont work after I replaced the pulse module, but when i was checking the module circuit board for power with a tester the wipers rotated once???? any suggestions

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: Windshield Wiper motor replaced, now wipers go wrong direction

This sounds like the park circuit is shorted.

Posted on Nov 25, 2008

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cadman000
  • 607 Answers

SOURCE: where is the Wiper Motor Pulse Board Module on a 1996 Firebird

Attached directly to the windshield wiper motor and washer pump assy, whhich can be found under the hood below the windshield.

Posted on Apr 02, 2009

cooper0365
  • 347 Answers

SOURCE: wiper motor buzzes and wont work

check the ground wire on the early 90s model did that they was losing ground try running a extra ground wire to the wiper motor

Posted on Oct 02, 2009

  • 701 Answers

SOURCE: wheres the circuit board for a windshield wiper

Hello jlwhelchel: My name is Roger and I will answer your question. Raise the hood locate the wiper motor. Remove the cover held on by three screws. Remove the cover. The cover is the module.
Should you need further help please just ask. Please rate the answer. This way I know the information was helpful. Thank You for using Fix Ya. Roger

Posted on Oct 16, 2009

  • 88 Answers

SOURCE: Placement of wiper motor pulse board on 2001 Monte

it will be behind the motor

Posted on Feb 11, 2010

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2002 trialblazer rear window wiper inop. changed switch and motor. no power to motor. cannot find relay nor fuse


There are something's involved that you are not aware of , or familiar with . Electronic control modules .
Rear Wiper/Washer System Controls
• Body control module (BCM)
• Liftgate control module (LGM)
• Rear wiper/washer switch
Do you know what a serial data network is ?
Rear Wiper/Washer System Operation
The rear window wiper/washer switch is an input to the BCM. The requested rear wiper mode is sent to the liftgate control module (LGM) by the BCM as a message on the serial data circuit, and the rear window wiper motor is controlled by the LGM. The switch power circuit to the rear wiper/washer switch is a 12-volt reference supplied by the BCM during ignition on, accessory or RAP power modes. The rear wiper/washer switch is a series of resistors and the switch position is determined by the voltage of the rear wiper/washer switch signal circuit to the BCM. The rear wiper/washer switch has continuity at all times and the BCM expects a rear wiper/washer switch signal voltage in all switch positions including OFF. The rear wiper motor is supplied battery positive voltage and ground. The LGM controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the LGM. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode. The liftglass and liftgate ajar switches are inputs to the LGM and must be in an inactive state in order for rear wiper washer system operation to be enabled. When an ajar switch is active the LGM suspends wiper motor operation directly and sends the ajar switch status messages over the serial data circuit enabling the BCM to suspend washer pump operation. The rear window washer pump is controlled by the BCM through the rear washer relay. Battery positive voltage is supplied to the coil and switch sides of the rear washer relay. When the rear window wash request is active the BCM energizes the relay by grounding the relay coil through the rear washer relay control circuit. When the relay is energized battery positive voltage to the relay switch is supplied to the washer pump control circuit.

Your best bet , take it to a qualified repair shop and have it checked for DTC'S - diagnostic trouble codes .
DTC B1017 or B3970
The rear wiper motor is supplied battery positive voltage and ground. The liftgate control module controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the liftgate control module. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode.
DTC B3799

2
Turn the ignition ON.
Operate the rear wiper switch through all the switch positions.
Does the rear window wiper operate normally?
--
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
3
Install a scan tool.
Display the liftgate control module data list.
Observe the following parameters while operating the respective switches. Refer to Scan Tool Data List for typical values.
• Liftgate Ajar Switch
• Liftglass Ajar Switch
Did the scan tool indicate the correct switch positions?
--
Go to Step 4
Go to Courtesy Lamps Inoperative in Lighting Systems
4
Observe the requested rear wiper parameter in LGM data list.
Operate the rear wiper switch through all the switch positions.
Does the scan tool indicate the correct requested rear wiper parameter in relation to the switch position?
--
Go to Step 5
Go to Step 6

Feb 06, 2017 | 2002 Chevrolet TrailBlazer

3 Answers

My f250 2003 wipers and pump dont work iv replaced switch and wiper moter fuses are good the 2 i could locate for wipers


Have you done a Probe Test on the vehicle? A Probe Light Tester can help you locate a short in your cars electrical system. To learn what a Probe Tester is and How to use it, watch the following video: https://www.youtube.com/watch?v=tXzKcEyIOq8

Dec 22, 2015 | Cars & Trucks

2 Answers

Ona 2002 gmc envoy the rear wiper does not work..I took the trim off and I am getting current to the module on the wiper motor. I disconnected the connector from a white module that is attached to the


Put power to the motor and see if it hums. Have somebody sit inside and turn key and turn power on to the switch on rear wiper And see if it turns or on the car battery. Power and negative, lets find out if it is the motor or not.

Dec 14, 2014 | 2002 GMC Envoy

1 Answer

Winshield wiper delay intermitent module making noises


The wiper delay is in the steering column. It's a small box about 2 x 2 inches with a wiring harness attached. With the testing procedures I found below, you should be able to figure it out. I found wiper delays on eBay for around $10 to $20. Good luck.

WINDSHIELD WIPERS CHEROKEE, COMANCHE & WAGONEER 1. POWER INPUT Remove circuit breaker. Test battery side of circuit breaker. If battery voltage is not present, repair open to splice. Test across circuit breaker terminals. Tester reading should be zero (0) ohms. If not, replace circuit breaker. 2. GROUND Connector A unplugged. Test terminal G. Tester reading should be zero (0) ohms. If not, repair open to ground. 3. INTERMITTENT WIPERS Ignition switch in ACCY. Remove delay module and plug connectors together from the module. If wiper operate in LO and HI speed modes and mist (washer) is working, if wipers and mist operate, replace intermittent module. If not go to step 4. 4. WIPER/WASHER SWITCH Ignition in RUN, wiper switch position as indicated, back probe switch side of connector A for standard, connector B for intermittent: Test connector terminal E-wiper switch in LO and mist/intermittent. If battery voltage is not present, replace switch. test connector terminal C-wiper switch in HI. If battery voltage is not present, replace switch. Test connector terminal F-wiper switch to OFF. If battery voltage is present until wipers stop and then voltage drops to zero (0), system is working fine. If this does not occur, replace switch. 5. INTERMITTENT WIPERS Connector B unplug. Test across terminal A and D while rotating switch from minimum to maximum delay. If tester reading is not between 0-500 ohms, replace switch. Test across terminal A and G while rotating switch from minimum delay to maximum delay. If tester reading is between 0 and 500 ohms, replace wiper module. If not replace switch. 6. WIPER MOTOR Ignition in ACCY, wiper switch position as indicated, probe connector D. Test connector terminal 1. If resistance is no zero (0) ohms,repair open to ground. Test connector terminal 4-wiper switch in any position. If battery voltage is present, replace motor. if is not repair open from fuse panel. Test connector terminal 2-wiper switch in LO. If battery voltage is present, replace motor. If not , repair open from wiper switch. Test connector terminal 2-wiper switch in HI. If battery voltage is present, replace motor. If not , repair open from wiper switch. Test connector terminal 5-wiper switch OFF with voltmeter connected. If battery voltage is present until wipers stop and then voltage drops to zero, system is OK, replace motor. If not, repair open from wiper switch.

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Found on the web. I hope this helps.
Rich Long

Jan 26, 2014 | Jeep Cars & Trucks

1 Answer

1984 buick lesaber wipers stoped pulsing


Usually when the delay function fails, the problem is in the circuit board module on the wiper motor.
You would need to check the circuit with a meter, the module may be available without buying a wiper motor.

Feb 08, 2013 | 1984 Buick LeSabre

1 Answer

I have a 1998 oldsmobile bravada and my windshield wipers stopped working. also when i stop and pulled off seems like it wants to cutoff like it putts when i pull off


MOST G.M VEHICLES WIPER PROBLEMS ARE CAUSED BY A WIPER CIRCUIT BOARD, OR PULSE MODULE. THE BRAVADA NEEDS THE CIRCUIT BOARD, IF THAT IS THE PROBLEM, IT IS A DEALER ITEM, YOU MAY BE ABLE TO CHANGE IT YOURSELF.

Jan 11, 2011 | 1998 Oldsmobile Bravada

2 Answers

1995 gmc sierra 1500 windshield wipers work on high sometimes works on regular or mist settings


It is the pulse module inside the wiper motor. It has bad solder joints were the wiring connector is soldered to the pused module board. You can either replace the module or just touch up the solder joints yourself.

Cheers,
Sven

Nov 04, 2010 | 1995 GMC Sierra

4 Answers

Wipers intermittent... sometimes they will not start untill the wiper motor, under the hood is hit whith palm of hand, sometimes rotating wiper control switch/curse control switch/washer button is pressed....


sounds like the wiper motor,module is bad thats what controls the wipers on where to stop and all that stuff,replace the wiper motor and youll be ok

Oct 13, 2009 | 1999 Chevrolet Suburban

1 Answer

How do I replace the wiper pulse module on a 94 chevrolet s10 pickup


open hood and go to the wiper motor remove electricle plug and plastic cover you will see a circuit board i believe you will be able to get it from there if not holler at me

Mar 18, 2009 | 1994 Chevrolet S-10

4 Answers

Need wiring diagram


i dont think u need a wiring diagram. you should check your wiper motor circuit board first. on my 94 s10 the wipers either worked when they wanted to and now they dont work at all. just either replace the circuit board yourself ($19.95 on ebay) or replace the whole wiper motor ($60 on ebay) and your wipers should work. just give this a shot as its a good place to start. i myself am going to replace the wiper circuit board as its cheap, and really easy to access and replace. all you need is a screw driver. good luck. and no, im not a GM Technician. just owned my truck since day 1 and always try to check vehicle forums for answers first.

Aug 01, 2008 | 1994 Chevrolet S-10

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