Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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I can activate the motor from my remote or door control to the down position. We I press the remote or the door control to open it...... it will not do anything? Can some one please help!

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  • doitright Jan 20, 2009

    I do not have the door engaged at all. There is no pressure on the motor. I am simply trying to check the motor. The springs are fine and I have already adjusted the force adjustments. Any more checks that anyone can assist me with?



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  • 118 Answers

First look the springs on the door. It is possible that you have a broken spring. If the springs are not broke, look at the force settings. They should be about half way.

Posted on Jan 19, 2009

  • Vince Heuser Jan 26, 2009

    Take the cover off the opener and check to see if the gear is stripped. The bottom of the cover will have a lot of white flakes laying in it if the gear is stripped.



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1 Answer

I can't find the fuse for the power windows on a 1998 Lincoln Navigator

All the other windows work ? Not a fuse , one fuse powers all the windows . Test for B+ voltage at the switch an the window regulator would be the proper diagnostic procedure . Do you own a volt meter ? know how to read a wiring diagram ? how to do basic automotive electrical testing . The Faint click you hear is probably a relay , which means the GEM - genaric electronic modual is energizing the window relay . The windows are computer controlled .

The GEM will activate the OTD Relay until one of the following conditions is met:
  • The LF regulator control switch is pushed to the UP position.
  • The LF regulator control switch is released (OFF position) and then moved to the down position (first detent) or one touch down (OTD) position (second detent).
  • Seven seconds have elapsed since the OTD was initiated.
  • A window regulator electric drive stall condition is detected on the one touch down sense line inputs.
The UP window operation is not controlled by the GEM. The feature is activated when the delayed accessory is active and the LF window regulator control switch is pressed to the UP position. The switch provides delayed accessory power to one side of the motor and ground to the other side through the one touch down relay. The one touch down relay is not active when the LF regulator control switch is in the UP position.
Passenger windows may be raised or lowered using the LF master control switches or the appropriate passenger window switch. Passenger window switches receive power when the delayed accessory relay is active and the LF remote lock-out switch is in the UNLOCK position. When in the LOCK-OUT position, the passenger windows are deactivated.
The GEM controls manual down and auto down window movement with the down window relay. The relay is activated by applying ground directly to one side of the down window relay coil, and deactivated by removing the ground signal.
The delayed accessory relay provides power for the operation of the power windows and the power moon roof. The delayed accessory feature is active when the ignition switch is in the RUN or the ACC position, or when the ignition switch is changed from RUN or ACC to the OFF/LOCK position and the LF and RF doors are closed.
The GEM will deactivate the delayed accessory feature when:
  • the LF door is ajar and the ignition switch is in the OFF/LOCK or KEY-OUT position.
  • the RF door is ajar and the ignition switch is in the OFF/LOCK or KEY-OUT position.
  • 10 minutes have elapsed since the ignition switch was changed from ACC or RUN to the OFF/LOCK position.
Feature inputs:
  • LF door open warning switch (open circuit with door closed, grounded with door ajar).
  • RF door open warning switch (open circuit with door closed, grounded with door ajar).
  • Ignition switch RUN position (battery potential on both the RUN and RUN/ACC inputs).
  • Ignition switch ACC position (battery potential on the RUN/ACC input).
  • Ignition switch OFF/LOCK position (absence of battery potential on the RUN, RUN/ACC, and START inputs).
The Trainer 24 Power Window Troubleshooting

Mar 03, 2017 | 1998 Lincoln Navigator

2 Answers

I have a genie pro 88 garage door opener push the button and it opens just fine traviels up to the limit switch and stops perfect. then push the button to go down and nota,

are the wires connected to the motor correct
for the limit switch there should be one wire ( normally black or neutral going to the center connection and the other wire ( red or active wires going to either of the other two terminals
that set up means that power is available to the limit switches and the return is the neutral wire
it works like this
on the up direction power is delivered to the motor by the controller box through a closed limit switch
when the up limit is circuit is broken the motor stops
the down button reverses the polarity of the motor in the controller box and so the motor runs in reverse through the the lower limit switch until that circuit is broken In the down action the upper limit switch circuit is completer but the control box has no power to it until the lower switch circuit is brokenis broken
the motor is dc voltage and to getting it to go up or down is done by the control box changing polarity for the motor power according to the button position pressed on the remote

Oct 28, 2016 | Genie Pro Screw Drive Garage Door Opener...

1 Answer

After connected to the power, the courtesy light flashed 2 times and the up and down button on then off. I pressed up, down and programme button, no respond. What should I do?

It is likely that your unit is equipped with a remote control lock out. When the lock is enabled the remote will not work protecting the home.

The Lock Button on the Door Control

The lock button on the door control may be activated. Press the button to turn this feature off. The light bulb will blink two times. This feature is designed to prompt you that the lock button is activated. When the lock button is ON the garage door opener will work from the door control but the remote controls are locked out.

Mar 16, 2016 | Building Materials

2 Answers

Driver door will not work lock or windows

They hooked into wiring they shouldn't have >
Power Window System Components
The power window system consists of the following components:
Driver door module (DDM)

Passenger door module (PDM)

Body control module (BCM)

LR power window switch

RR power window switch

Window up and window down relays in each of the rear passenger window switches

Window lockout switch

Reversible power window motors in each of the doors (circuit breaker protected)

LT DOOR CB 25A (System power for left rear window)

RT DOOR CB 25A (System power for right rear window)

Power Window System Controls
The power window system will operate anytime the retained accessory power (RAP) system is active or when the ignition switch is in the ACCY or ON position.
The DDM contains 4 power window switches which are integral components. Closing any of the normally open, rocker type switches provides the DDM with a request for power window operation. The switches for the 2 front windows have 3 positions Up, Down and Express Down, while the switches for the rear windows have only 2 positions, Up and Down. Each of these switches and their positions is a direct input into the DDM. Upon receiving a request for power window operation, the DDM, transmits a class 2 message indicating the switch and it's changed position.
The PDM contains a single power window switch that is an integral component. Closing of this normally open, rocker switch provides the PDM with a request for the front passenger power window operation. The switch for the front passenger window has 2 positions Up and Down. Each of these switch positions is a direct input to the PDM.
The 2 rear passenger doors have there own switches. Each of the switches contain a power window up and down relay. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a class 2 message from the DDM, can control the set of relays which will activate the rear window motors.

Jan 10, 2016 | 2004 GMC Envoy

1 Answer

Resetting motor of a dominator garage door

Doe the motor have a battery back-up, or mains only?
Step 1: Disconnect the linking arm from the motor traveller, and test (by pressing button on remote or wall console), that motor runs traveller to the fully open position, and stops where the "open" limit switch is. Then run motor (by pressing button on remote or wall console), to the fully closed position. If the motor fails to run through a full open/ full close cycle, the limit switches require checking.Assuming that the motor runs through the full open/full closed cycle, focus on the door. All motors have built in circuitry, preventing motors from crushing objects. A double garage door should be able to be lifted easily by one hand. The door should be able to be left at any height, and remain there, or creep ever so slowly downwards (travel time of approx 10mm per 5 seconds is ok). If your door is properly balanced, and the motor will still not lift it, the control card on the motor is damaged, and requires replacement.

Jul 02, 2017 | Home Security

1 Answer

Door goes down and when it stops at botton, it turns and goes back up ??? Need adjusting ..How can I adjust???

Adjust the position of the door by using the black and purple buttons. Black moves the door UP (open) and purple moves the door DOWN (close)
Setting the up position: 1. Press and hold the black button until the LED starts flashing slowly, then release. 2. Push and hold the black button until the door reaches the desired UP (open) position 3. Push the door control or programmed remote control. This sets the Up (open) position and begins closing the door. 4. Immediately when the door begins to close press and release the black or purple button. This will stop the door Setting the Down position: 5. Push and hold the purple button until the door reaches the desired DOWN (Closed) position. 6. Once the door is closed, If there appears to be too much pressure on the door, you may toggle the door back and forth using the black and purple buttons to reach the desired closed position. 7. Push the door control or programmed remote control. This sets the Down (closed) limit and the door should open.

Aug 11, 2011 | Chamberlain 3/4-HP Whisper Drive Plus...

1 Answer

I have a 06 trailblazer, and my drivers window will not go down. I had the motor cahnge it and is still not working. WE even took the switch out of the drivers door and connected it to the passenger door...

Are you aware of the fact that there are door modules ? Controlled electronically !
Power Window Inoperative - Driver Door
Operate the driver power window in the UP and DOWN directions.
Does the driver power window operate properly?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
Install a scan tool.
Monitor the Driver Window Status Data parameter in the driver door inputs list.
Does the Driver Window Status Data parameter display an active state?
YES - Go to Step 11
NO - Go to Step 4
Monitor the Driver Window Status Data parameter in the driver door module (DDM) inputs list.
Activate the driver power window switch in the up and down positions.
Does the Driver Window Status Data parameter change accordingly?
YES - Go to Step 5
NO - Go to Step 11
Connect a test lamp to a good ground.
Backprobe the battery positive voltage circuit at connector C1 cavity D.
Does the test lamp illuminate?
YES - Go to Step 6
NO - Go to Step 13
Disconnect the driver power window motor.
Connect a test lamp to a good ground.
Probe the power window motor up control circuit at the power window motor harness connector.
Activate the power window switch to the UP position.
Does the test illuminate?
YES - Go to Step 7
NO - Go to Step 9
With the test lamp still connected to a good ground, probe the power window motor down control circuit.
Activate the power window switch to the DOWN position.
Does the test lamp illuminate?
YES - Go to Step 8
NO - Go to Step 10

You probably have a bad door module .

May 21, 2017 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

Help, our neighbors can open our garage door with their remote, but not vice versa. Want to reset the code on the garage door motor, but have no manual...thank you for any help!

If one of your neighbors remote controls is inadvertently programmed into your receiver, you door will open when their remote is activated. If this happens you will need to clear out your receiver and reprogram your remote controls. Press and hold the smart/learn button for 6 seconds or until you see the small LED light near the button turn itself off. If the above steps have been followed and the symptoms continue, there may be an electronic short in either the wall control button or the receiver logic board. In this case, remove the wall control wires from terminals 1 and 2 on the motor unit. Should the symptoms persist after the wires are removed, replace the receiver logic board. If the symptoms stop with the wall control wires removed from the motor unit, replace the wall control button, and the wires leading to the wall control button.

Jan 18, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Central locking not working on key.

Before you spend bigger amount, check the battery in the key. Usually a CR2032 battery can be find there. (Open the Keyfob by inserting an object into the key ring holder and pulling the top and bottom apart, Seperate the two halfs, Open the top half to expose the battery... )

Nov 28, 2008 | 1998 Audi A6

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