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Dashboard comes on an then go's off some one said it was my transmission modgual no reading to my bcm can that be why

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What on the dash board comes on and then goes off
the dash board is that part of the car that holds the speedo , tacho, temp gauge , charge light, seat belt light dash lights , radio
add to that what make , model ,year transmission type are you talking about
as posts are not linked post again and be more specific

Posted on Dec 11, 2016

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Posted on Jan 02, 2017

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Need to remove center console in 2007 buick Lucerne, stuck in park


Do you know why it's stuck in park ? Do the brake lights work ?
Automatic Transmission Shift Lock Control Description and Operation (Floor Shift)
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock solenoid (serviced as the automatic transmission shift lock actuator), as well as the body control module (BCM) and the engine control module (ECM)/powertrain control module (PCM). The shift lock solenoid is located within the floor shift control assembly with vehicles equipped with floor shift.
• The BCM controls the voltage supply circuit of the shift lock control solenoid. The following conditions must be before the BCM will supply voltage to the shift lock control solenoid.
The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock solenoid:
• The ignition is in the ON position.
• The ECM/PCM sends an input via GMLAN serial data to the BCM indicating the transmission is in the PARK position.
• The BCM determines the brake pedal is applied according the brake pedal position.
Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically unlocking the shift lever allowing the driver to move the shift lever out of the PARK position as the solenoid energizes. When the brake pedal is not applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid mechanically locks the shift lever in the PARK position.
During remote start operation, the BCM will de-energize the shift lock control circuit, locking the shift lever in the PARK position.
Do you know what DTC'S are ?
DTC B2705 Gearshift Unlock Circuit !
The body control module (BCM) controls the shift lock solenoid by providing battery voltage to the shift lock control solenoid. The BCM utilizes a smart driver to control the voltage supplied to the shift lock solenoid. The smart driver monitors the voltage and current flow of the control circuit.

Transmission Control Lever Malfunction (Floor Shift)
Circuit/System Verification
Ignition ON, while pressing the brake pedal, observe the scan tool Brake Applied Output Signal parameter. The reading should be ON with the brake pedal pressed.
? If not the specified value, refer to Stop Lamps Malfunction .
Press the brake pedal, the vehicle operator should be able to move the shifter lever out of the park position.
With the vehicle moving over 5 km/h (3 mph), the vehicle operator should not be able to move the shift lever into the reverse position.

May 25, 2017 | Buick Cars & Trucks

1 Answer

I have a 2003 Avalanche. Heater is only blowing cold, BUT, if I play (slam) the heat controls up and down I can sometimes get warm/hot air for a few minutes, then the defrost fan gets louder and turn


You need a new B.C.M. stands for body control modgual you can put a used one in they are under the dash it is a computer that controls the command when you push a button for interior of car

Jan 24, 2013 | 2004 Chevrolet Malibu

1 Answer

ABS Light is on dashboard


Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS, TPMS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Anti-lock brake system. TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module. TPMS Tire Pressure Monitor System

Nov 01, 2012 | Cars & Trucks

1 Answer

Engine light on & dashboard light says trans fluid


Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Antilock brake system.TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module

Oct 22, 2012 | Cars & Trucks

1 Answer

2004 Jaguar X-Type AWD 3.0 65,000 miles. It starting shifting rough and I got a gearbox fault message on the dashboard. At the same time, the transmission fluid started leaking. The garage couldn'


Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Antilock brake system.TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module

Oct 17, 2012 | 2004 Jaguar X-Type

1 Answer

My dashboard lights (battery emergency brake light & air bags) are flashing on my dashboard while driving but go out when I come to a stop on my 2001 santa fe


Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Antilock brake system.TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module

Oct 17, 2012 | 2001 Hyundai Santa Fe

1 Answer

Flashing light on my dashboard for air conditioner and blower


Possible Solution 1 - Check your fuses2 - You can try disconnecting the battery for about 5 minutes to reset the onboard computer (Body Control Module BCM) which controls the items you mention. 3 - If that does not work, you can then try disconnecting (with battery disconnected for at least 30 mins to disarm airbag) and reattaching the wire connector to the BCM in case it has developed a bad connection - This is located under the dashboard on the drivers side. Should be a big square or rectangle connector with lots of wires and a bolt going through it. Unscrew the bolt and disconnect the connector from the BCM then reattach and screw the bolt back in.
The Body Control Module (BCM) supplies vehicle occupants with visual and audible information and controls various vehicle functions, To provide and receive information, the module is interfaced to the vehicle's serial bus communications network, the Chrysler Collision Detection (CCD) bus. This network consists of the powertrain control module (PCM), the Transmission Control Module (TCM) , the electro/mechanical instrument cluster (MIC) , the Airbag Control Module (ACM) , the Compass/mini-trip module and the Controller Antilock brake Module (CAB). The BCM is operational when battery power is supplied to the module. Ignition switch power is needed for ignition switch functions.
The BCM provides the following features: • Automatic door locks • Battery protection • Chimes • Compass/mini-trip support • Courtesy lamps • BCM diagnostic support • Door lock inhibit • Headlamp time delay • Ignition key lamp • Illuminated entry • Instrument panel dimming • Mechanical instrument cluster support • Power door locks (with/without remote keyless entry) • Sliding door memory lock • Vehicle Theft Security system (VTSS) • Windshield wipers / washers (front and rear)
http://autorepair.about.com/library/a/1c/bl546c.htm

Aug 13, 2009 | 1998 Dodge Caravan

1 Answer

Model 2002 dodge grand caravan sports dashboard not working speedometer, tachometer and fuel gauge


If you look under the dashboard on the driver's side, there is a fuse panel. Under this panel is the BCM(body control module). There may be a bad relay in the bcm. Worse case scenario is a bad BCM. I hope this information is helpful to you, Good luck.

Apr 16, 2009 | 2002 Dodge Grand Caravan

1 Answer

Gear select problem


The PRND321 switch is mounted on the transaxle assembly. It is a multi-signal switch sending information relative to gear selector position to the BCM and ECM. The PRND321 switch also contains the neutral safety {start} switch and back-up light switch. It also provides park input to the automatic door lock module {if equipped}. Your problem is not an internal transmission problem. The service manual says to check for open circuits or shorted ground circuits through a diagnosis chart that is in this manual. One part of it, at the end says to replace the PRND321 switch and the other says to replace the BCM or repair the open circuit or wire, depending on what code is read through the BCM. Having worked at a Buick dealership, I have sold a few of the switches for various problems. This switch is under the hood and on top of the transmission in-which it is exposed to heat - cold and water. My suggestion is to reset and clear the codes on the diagnostic center and see if they come back. Check connectors on the switch and if codes come back replace switch since it would be less expensive than a BCM. The switch is a wear item as it is moved every time you move the gear selector.

Mar 30, 2009 | 1989 Cadillac Seville

2 Answers

Do the backup lights work off the transmission or a switch on the column


I can relate ... been without reverse lights for a while.
Here's my understanding of the communications that take place in this process: when you put the vehicle in reverse, there is a backup light switch on the transmission that sends a signal to the Transmission Control Module (TCM), that then forwards that information to the BCM, and the BCM sends the signal to the backup lights.

Have had different diagnoses for the problem ranging from BCM (body control module), to FCM (front control module), to the standard bulb, wiring, etc. Dealer wanted to do a $1000+ job thinking it could be the BCM. Being cheap decided to do some troubleshooting on my own ... with help from another site where I contacted a Dodge Expert.

In my case, we tested wiring, and found there was a fault in the wire ... replaced with a new wire.
So sending 12V to from the battery to the lights made the reverse lights come on -- so wiring and bulbs good.

Didn't fully fix the issue ... tested the pin from the BCM that carrys the signal to the backup lights to come on and found that the BCM is NOT sending out the signal. Looks like it is a BCM issue but want to check to make sure the BCM is getting the right input signal. So that is now where my testing will go.

Hope that helps.

Aug 09, 2008 | 2003 Dodge Caravan

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