Question about 2004 Oldsmobile Alero

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What does a body control module control on a 2004 alero

Specificaly want to know if this control the wiper motor

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  • Master
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BCM (body control module) controls all accessories (airbags, windows, locks, radio, etc) I do not believe the BCM controls the wipers

Posted on Jan 19, 2013

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Posted on Feb 28, 2009

ZJLimited
  • 17970 Answers

SOURCE: 2001 Oldsmobile Alero 2.4L

When a GM radio displays the "LOC" this means the Theft Lock has been activated on the vehicle. The only way to get it to work after this occurs is to unlock the radio. The process for unlocking the radio is one that can be done by the dealer,but it can also be done by the car's owner in the driveway at home.

So instead of driving to the dealer and paying someoneto unlock the radio, follow this short process and save some money.

Instructions: Turn the ignition key to the "on" position. It may be necessary on some vehicles to start the vehicle. Most will not require the vehicle to be running:
1. Press and hold the preset buttons numbered two and three for 10 seconds at most. Write down the three-digit number that displays on the screen. Some radios will display only two digits.
2. Press the "AM/FM" button on the radio. Write down the second three-digit number. Again, some radios will only displaytwo digits. The AM/FM button has to be pressed quickly after getting the first code. If pressing the button does nothing,then start over.
3. Call 1-800-537-5140 and listen for the make of the vehicle: Chevrolet will be one, Oldsmobile will be two and so on.
4. Press the number corresponding to the make of the vehicle followed by 06010 then the "*" or star key. So for aChevrolet radio, for instance, the number entered will be 106010*.
5. Enter the four- or six-digit code retrieved from the radio. Then write down the code given over the phone.
6. Go back to the radio and press the "Hour Set" button until the first two digits of the code from the phone appear. Now press the "Minute Set" button until the second two digits of the code appear.
7. Press the "AM/FM" button. The word "SEC" should appear on the screen. If it does then turn the radio on and it will work. If not then repeat steps 4 through 7 and get additional codes.

If you bought the car new then there should be writen in the manual the code for the theft lock system on the radio. If pre-owned then it might, might not be in there. Or, if you dont have one at all, go to your nearest GM dealer and have them fix it by finding the code. Make sure to have them write it down for you incase this happens again. Be prepared to prove you own the vehicle.

Hope this helps.

Posted on Sep 08, 2010

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1 Answer

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

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

1 Answer

Wipers in up position in off. 94 lincoln town car. How do the wipers return to rest position?


Do you know how to do electrical testing ?
PINPOINT TEST E: WINDSHIELD WIPERS WILL NOT PARK AT PROPER POSITION E1 CHECK WIPER MOTOR GROUND
  • Disconnect connector from windshield wiper motor.
  • Check continuity to ground at Circuit 57 (BK).
Is ground OK? Yes No GO to E2 . SERVICE open in Circuit 57 (BK). RESTORE vehicle. RETEST system. E2 CHECK FOR POWER AT WIPER MOTOR
  • Place ignition switch at RUN and multi-function switch at OFF.
  • Check for battery voltage between Pin 1, Circuit 65 (DG) and Pin 4, Circuit 57 (BK) at the windshield wiper motor connector.
Is B+ present? Yes No GO to E3 . SERVICE open circuits. RESTORE vehicle. RETEST system. E3 CHECK MOTOR CIRCUIT CONTINUITY THROUGH WINDSHIELD WIPER CONTROL MODULE
  • With multi-function switch at OFF, check continuity between Circuit 28 (BK/PK) and 56 (DB/O) and between Circuits 61 (Y/R) and 63 (R).
Is continuity OK? Yes No GO to E5 . GO to E4 . E4 CHECK CIRCUITS TO WIPER CONTROL MODULE
  • Disconnect wiper control module connector.
  • Check continuity of Circuits according to the chart below from the wiper motor to the wiper control module.

    Wiper Control Module Connector Wiper Motor Connector Pin Circuit Pin 6 Pin 2 28 (BK/PK) Pin 8 Pin 6 56 (DB/O) Pin 12 Pin 5 61 (Y/R) Pin 13 Pin 3 63 (R)
Is continuity present? Yes No REPLACE wiper control module. RESTORE vehicle. RETEST system. SERVICE open circuits. RESTORE vehicle. RETEST system. E5 CHECK WIPER MOUNTING ARM/PIVOT SHAFT
  • Check that windshield wiper mounting arm and pivot shaft and linkage is not bent, cracked or mis-positioned.
Is windshield wiper mounting arm and pivot shaft linkage OK? Yes No REPLACE windshield wiper motor. RESTORE vehicle. RETEST system.

Nov 14, 2016 | 1994 Lincoln Town Car

1 Answer

2007 Pontiac g6 wipers stay in upright position


Hey Derek , here is how the wipers park position is suppose to work !
Windshield wiper motor park operation is controlled by the body control module (BCM) using an input from the park switch within the wiper motor assembly. The BCM monitors the windshield wiper motor park switch circuit to determine if the windshield wiper blades are at the bottom of the glass. The circuit will be pulled to ground by the wiper motor park switch while the windshield wiper motor is operating. 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. The BCM will park the wipers the next time the ignition is turned ON.
The wipers will not park when they are commanded ON and OFF with a scan tool. The BCM will park the wipers the next time the wiper switch is turned ON and OFF.
The BCM provides stall protection for the wiper motor by monitoring the park switch. If the park switch does not transition for 3 seconds while the wipers are operating, the BCM will assume that the wiper motor is stalled, and will de-energize the wiper relay until the wiper switch is cycled OFF and ON again.
Check for a voltage signal on the yellow wire at the wiper motor assembly , this is signal to the BCM ! If there is no signal you need to replace the windshield wiper motor assembly ? If there is a signal need to have Tech 2 scan tool hooked up to see if The BCM is the problem ! Relay #39 an #40 are the high an low wiper relays in the under hood fuse block ! Do you have a volt meter ,do you know how to do electrical testing ?

Sep 21, 2015 | Pontiac Cars & Trucks

1 Answer

Winsheild wiper will not work


The wiper control module is probably at fault ,without test that is just a guess . The wiper/washer switch is a input to the wiper control module. Do you know anything about automotive electronics an electrical systems ?
  • The Wipers are Inoperative
  • Fuse.
  • Wiper motor.
  • Multi-function switch.
  • Circuitry.
  • Wiper control module.
  • GO to Pinpoint Test B .

Voltage drop testing the power an ground circuits for the wiper control module would be a good place to start . Do you know how to test electrical circuits with a volt meter ?
PINPOINT TEST B: THE WIPERS ARE INOPERATIVE CONDITIONS DETAILS/RESULTS/ACTIONS B1 CHECK FUSE JUNCTION PANEL FUSE 16 (30A)
Fuse 16 (30A)

  • Is the fuse OK?
Yes GO to B2 .

No REPLACE the fuse. TEST the system for normal operation. If the fuse fails again, CHECK for a short to ground. REPAIR as necessary. B2 CHECK FOR VOLTAGE TO THE WIPER CONTROL MODULE - CIRCUIT 65 (DG)
Wiper Control Module C294
Measure the voltage between wiper control module C294-2, circuit 65 (DG), and ground; and between wiper control module C294-11, circuit 65 (DG), and ground.
  • Is the voltage greater than 10 volts?
Yes GO to B3 .

No REPAIR circuit 65 (DG). TEST the system for normal operation. B3 CHECK CIRCUIT 57 (BK) FOR OPEN Measure the resistance between wiper control module C294-3, circuit 57 (BK), and ground; and between wiper control module C294-5, circuit 57 (BK), and ground.
  • Are the resistances less than 5 ohms?
Yes GO to B4 .

No REPAIR circuit 57 (BK). TEST the system for normal operation. B4 CHECK THE MULTI-FUNCTION SWITCH
Multi-Function Switch
Check the multi-function switch; refer to Section 211-05 .
  • Is the multi-function switch OK?
Yes GO to B5 .

No REPLACE the multi-function switch; REFER to Section 211-05 . TEST the system for normal operation. B5 CHECK CIRCUIT 993 (BR/W) FOR OPEN Measure the resistance between multi-function switch C269-4, circuit 993 (BR/W), and wiper control module C294-7, circuit 993 (BR/W).
  • Is the resistance less than 5 ohms?
Yes GO to B6 .

No REPAIR circuit 993 (BR/W). TEST the system for normal operation. B6 CHECK CIRCUIT 589 (O) FOR OPEN Measure the resistance between multi-function switch C269-1, circuit 589 (O), and wiper control module C294-1, circuit 589 (O).
  • Is the resistance less than 5 ohms?
Yes GO to B7 .

No REPAIR circuit 589 (O). TEST the system for normal operation. B7 CHECK THE WIPER CONTROL MODULE OUTPUT FOR VOLTAGE
Wiper Control Module C294

Wiper Motor C152
Turn the multi-function switch to the HI position. Measure the voltage between wiper motor C152-4, circuit 57 (BK), and wiper motor C152-3, circuit 56 (DB/O).
  • Is the voltage greater than 10 volts?
Yes REPLACE the wiper motor; REFER to Motor-Windshield Wiper . TEST the system for normal operation.

No GO to B8 . B8 CHECK CIRCUIT 57 (BK) FOR OPEN Measure the resistance between wiper motor C152-4, circuit 57 (BK), and ground.
  • Is the resistance less than 5 ohms?
Yes REPLACE the wiper control module; REFER to Module-Windshield Wiper . TEST the system for normal operation.

No REPAIR circuit 57 (BK). TEST the system for normal operation.

Jun 29, 2017 | 2002 Lincoln Town Car

1 Answer

A6 wipers


How do you know motor is fine, you jumped a wire across from battery to motor? if what you say is correct then it has to be the wiper control switch, if when u jump wire across and motor turns but not wipers the the attachment from motor to wiper assembly is stripped, disassemble and find if it's shaft or plate that's stripped happens when people don't clean windows off from snow ice and just turn wipers on.

Jun 09, 2012 | 2005 Audi A6 2.0

1 Answer

My wipers stop half way when I turn them off, sometimes they stop working all together.


Built into the wiper motor is a control switch. It will be the little black box sitting on top of the wiper motor assembly. My memory fails me to weather the control can be replaced separate from the motor or the system is a complete unit. You parts house will know for sure.

Feb 22, 2010 | 1983 Chevrolet Silverado

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

Need to get a programmer dont know where its at


  • Windshield Wipers Continue to Run When Turn Signal and Windshield Wiper Switch Are Turned OFF
  • Damaged turn signal and windshield wiper switch .
  • Damaged windshield wiper motor .
  • Damaged windshield wiper control module.
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Pin Number Circuit Circuit Function 1 57 (BK) Wiper Motor Ground (Park) 2 28 (BK/PK) Wiper Module to Wiper Motor (Park Switch) 3 65 (DG) Wiper Motor Power (Park Feed) 4 61 (Y/R) Wiper Motor Common (RUN) 5 56 (DB/O) Wiper Motor LO 6 58 (W) Wiper Motor HI
Windshield Wiper System The windshield wiper system consists of :
  • Windshield wiper motor (17508) (F-type).
  • Washer system.
  • Windshield wiper control module.
  • Turn signal and windshield wiper switch (13K359).
The windshield wiper control module is:
  • Located at the instrument panel fuse panel.
The windshield wiper motor is:
  • Attached to the cowl top extension (021A36) .
  • Connected to windshield wiper mounting arm and pivot shaft (17566) .
The turn signal and windshield wiper switch features a:
  • Rotary wiper switch.
  • Push type washer actuator.
OFF/Low/High Speed
  • Has a two-speed, permanent magnet, three brush electric windshield wiper motor .
  • The windshield wiper motor has a brush rigging that permits selection of low or high speed.
  • When the turn signal and windshield wiper switch is in the LO position, the common brush and the blue/orange wire brush are used, and the windshield wiper motor operates at low speed.
  • When the turn signal and windshield wiper switch is in the HI position, the common brush and the white wire brush are used.
  • In HI position, electric current will bypass a portion of the armature winding causing the windshield wiper motor to operate faster.
  • When the turn signal and windshield wiper switch is moved to the OFF position, the windshield wiper motor will continue at low speed until the park switch outer contacts open.
  • When the park switch contacts open, the windshield wiper motor stops in the park position.
Interval
When the turn signal and windshield wiper switch is in the interval position:
  • The wipers make single wipes separated by pauses.
  • The rotary switch is on the end of turn signal and windshield wiper switch .
  • The length of the pause can be set from approximately 1 to 17 seconds.
  • Length of pause decreases as the rotary switch is rotated away from off.
  • Length of pause increases as the rotary switch is rotated toward off.
While in the interval wiper mode:
  • It is normal to hear a slight click at the beginning of each on/pause cycle. NOTE: When using interval wipers, the first wipe may not occur until after a pause of up to 17 seconds.

May 27, 2009 | 1994 Ford Mustang

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