Question about 1996 Chevrolet Corvette

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Headlight actuators continue to run after reaching full open or full closed positions. (about 10 to 15 rotations) actuators also run after turning parking lights off. does the switch control the travel of the motors?

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I'm not really sure but here is a place that sells only GM parts and they maybe able to answer that for you Schram auto and truck parts 1-800-292-1032

Posted on Feb 15, 2009

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The running bords on my 2008 Yukon stop working


Circuit/System Description
The assist step control module (ASC) controls the running board actuators to extend or retract the running boards. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC control module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.
You should take this to a ASE certified repair shop that has the diagnostic tools to check for stored DTC'S in the running board control module . A code reader for check engine light codes will not work for this system !
This system can set numerous DTC'S
?€¢
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors
DTC B051A 0B: Left Side Assist Step Motor Control Circuit Current Above Threshold

DTC B051A 01: Left Side Assist Step Motor Control Circuit Short to Battery

DTC B051A 02: Left Side Assist Step Motor Control Circuit Short to Ground

DTC B051A 04: Left Side Assist Step Motor Control Circuit Open Circuit

DTC B051B 0B: Right Side Assist Step Motor Control Circuit Current Above Threshold

DTC B051B 01: Right Side Assist Step Motor Control Circuit Short to Battery

DTC B051B 02: Right Side Assist Step Motor Control Circuit Short to Ground

DTC B051B 04: Right Side Assist Step Motor Control Circuit Open Circuit

DTC B051C 01: 10 V Reference Circuit Short to Battery

DTC B051C 02: 10 V Reference Circuit Short to Ground

DTC B051C 2A: Left Side Assist Step Position Sensor Circuit Too Many Pulses

DTC B051C 22: Left Side Assist Step Position Sensor Circuit Low Time < Minimum

DTC B051C 29: Left Side Assist Step Position Sensor Circuit Too Few Pulses

DTC B051C 62: Left Side Assist Step Position Sensor Circuit Actuator Stuck Open

DTC B051C 63: Left Side Assist Step Position Sensor Circuit Actuator Stuck Closed

DTC B051D 2A: Right Side Assist Step Position Sensor Circuit Too Many Pulses

DTC B051D 22: Right Side Assist Step Position Sensor Circuit Low Time < Minimum

DTC B051D 29: Right Side Assist Step Position Sensor Circuit Too Few Pulses

DTC B051D 62: Right Side Assist Step Position Sensor Circuit Actuator Stuck Open

DTC B051D 63: Right Side Assist Step Position Sensor Circuit Actuator Stuck Closed
If you don't know how the system works you could make it worst !
You

Aug 16, 2015 | Cars & Trucks

1 Answer

Fix for the door glass,2009 CHALLENGER. Won't reset to down position when opening door to allow window to break seal.Then move up and seal glass when door is closed. SMart Glass?


This may be as simple as relearning the window stop positions. Perform the following procedure to relearn the windows;

1) Sit in the drivers seat and ensure both doors are fully closed.
2) Turn the key to the ON position but do not start the vehicle.
3) Pull up on the drivers window switch until the window reaches the full up position, then CONTINUE HOLDING THE SWITCH UP for 2-5 seconds, then release the switch.
4) Push down on the drivers window switch until the window fully opens, then CONTINUE HOLDING THE SWITCH DOWN for 2-5 seconds, then release the switch.
5) Repeat steps 1-4 for the passenger window.
6) Close both windows and check the operation of the smart glass.

Let me know if you need further help.

Nate

Oct 18, 2014 | 2009 Dodge Challenger

1 Answer

2002 Jeep Liberty heater works, but defroster blows cold air


on all cars made
(you can read the FSM at any time and see exact way and tests)
1: damper stuck or its actuator bad. ( 3 kinds uses on all cars)
2 ;controls to damper actuator bad.
3: wires between both faulty.

3 types are motor, vacuum servo and cable.
you have 2 of the 3.
the blend is a motor actuator
the recric is vacuum servo
the motor types are very hard to test, read the FSM.

ill post the calibration

quote

Use this procedure to ensure that the A/C-heater control is correctly calibrated to the blend door actuator. If the calibration is not correct, the heating-A/C system may experience a condition where full heating or cooling capabilities cannot be obtained.
Manual calibration of the A/C-heater control should be performed if the blend door actuator is not functioning properly, or if the temperature of the conditioned air is too warm with the temperature control in the full cold position or too cool with the temperature control in the full hot position.
NOTE This calibration procedure can only be started within the first ten seconds after the ignition switch has been turned from the OFF position to the ON position. Make sure that the battery is fully charged prior to beginning the calibration procedure. NOTE The length of the pause made at each end of the temperature control rotation (sweep) is important. 5 seconds) or too long (greater than 1.5 seconds).
  1. With the ignition switch in the OFF position, move the temperature control to its middle (12 o'clock) position.
  2. Turn the ignition switch to the ON position (do not start the engine).
  3. Within 10 seconds of turning the ignition switch from the OFF to the ON position, perform the following rotations (sweeps) of the temperature control.
    • From the 12 o'clock position, rotate the temperature control counter-clockwise to the full cold position. Pause one second.
    • Rotate the control clockwise to the full hot position. Pause one second.
    • Rotate the control counter-clockwise to the full cold position. Pause one second.
    • Rotate the control clockwise to the full hot position. Pause one second.
    • Rotate the control counter-clockwise to the full cold position.

Oct 05, 2014 | 2002 Jeep Liberty

1 Answer

Headlights won't open on 1985 Corvette


There are two motors, and three relays in the system. Here's how it works:

The headlight door motors reverse direction by reversing polarity. However, the automatic shut off (high torque switch, or HTS) makes that a rather more complex task than at first it might seem.

That's because when a motor reaches its limit, one of the 'wires' is disconnected from the motor by the HTS. Reversing the polarity at this point wouldn't do anything since the circuit is broken by the HTS.

Consequently, each motor has three wires for control. The combination of the blue wire, gray wire, and green wire provide polarity reversal to the motor (to make it able to run in both directions) and to run each motor from its resting state, after it has shut off.

There are of course two motors. They operate and are controlled identically.

Here's the matrix:

RIGHT HAND MOTOR

Blu Grn Gry
up: (+) (-)
dn: (+) (-)

That is, in order to run the motor up, the system connects the green wire to the hot side and the gray wire to ground. In order to run the motor down, the system connects the blue wire to the hot side, and the green wire to ground.

The left hand motor operates the same, except for its blue wire is actually blue with white stripes.

There is an actuator relay for each light mounted on the body of the light housing. There is also an isolator relay, mounted on the fender wall on the driver's side. When operating properly, the two actuator relays act identically.

The actuator relays get their instructions from the isolation relay. When the motors need to run down, the isolation relay is not energized, the blue (and blue/white) wires make with the hot side through the closed contacts of the isolation relay (which is not energized), and the ground is furnished to the motor through the closed contacts of the actuator relay until the circuit is broken by the HTS. When operating properly, neither the motors nor the relays draw any current in the full down position.

When it's time to go up, the actuator relays are energized when the pink wires coming from the isolation relay are connected to the hot side through the newly closed contacts of the isolation relay, the isolation relay is energized because the yellow wire coming from the head light switch is now hot.

When the actuator relays are energized, they furnish 12v from the always hot red wires, through their newly closed contacts, to the green wire. The motor is grounded through the newly closed contacts of the actuator relays. The motors will run up until the circuit is broken by the HTS. When operating properly, with the light doors in the full up position, all relays are energized and draw current, but the motors do not.

There are very counterintuitive things about this circuitry: When the motors are running UP, both the hot side and the ground are furnished by and through the actuator relay. However, when the motors are running DOWN, only the ground is furnished by the actuator relay because the blue and blue/white wires do not run to or through the actuator relay.

Similarly counterintuitive, when the motors are running down, the hot side is supplied by and through the isolation relay, but when they are running up, the hot side is supplied not by and through the isolation relay, but through the always hot fusible link.

That's how the headlamp door relays and motors work. The relays are not cheap but not terribly expensive, either: $17 ea for the actuator relays and $25 for the isolation relay. Proper trouble shooting can save a buck or two.

It is fairly easy to swap the actuator relays from side to side. If the symptoms change with them, then its probably the relays.

Although the actuator relays look similar to the isolation relay, they are very different, they cannot be swapped. Please note that the system is very interdependent, and it's easy to see why Chevrolet changed to electronic (as opposed to electro-mechanical) controls.
Hope this helps.

Apr 13, 2014 | 1985 Chevrolet Corvette

1 Answer

Air is redirected from the vents when you turn the headlights on


if you have vacuum operated headlight covers, these will take pressure from the system to stay open and light the road..because the actuators are spring loaded sothe louvers close without any pressure..this vacuum also operates the heater controls and vents,, check the light covers for broken or loose hoses and also check the vacuum reservoir and its hoses too..prossess of elimination kido..good luck..unless theres a cut hose behind the dash somewhere..withthe engine running listen for a hissing sound..it will tell you if there is a leak in a hose..

Jan 19, 2013 | 2004 Chrysler Sebring

1 Answer

Headlight on 1985 corvette


Head lights have a reed switch built into the unit. if a gear is stripped / missing a tooth the headlights will continue to run. You can replace the gears for around $50.00 for a set. I would go with the , metal gears for the few dollars more, especially in cold climates where there is snow.

Dec 13, 2012 | 1985 Chevrolet Corvette

2 Answers

Tailgate open/ lock latch in closed position so tailgate will not close/ can't et lock latch to open so I can close tailgate completely


Annoying, but easy to fix: Actuate the opening handle and manually rotate the latch to the open position.

Feb 27, 2011 | 2004 Chrysler Pacifica

1 Answer

The doors lock automatically on my daughter's '99 Cougar. This has happened to me when I left the keys in the ignition and closed the driver's door. After AAA came and unlocked the doors, I removed the...


shorted wiring in doors or shorted door lock actuator in door. A grounding of a wire makes them lock normally. SO, any bare wire touching metal will ground it and lock the doors.

Principles of Operations
The Door Switch Lock Function When a door lock switch is moved into the lock position or a door lock cylinder is rotated to the lock position, the door lock switch grounds the lock circuit input to the central security module (CSM). The CSM then provides 12 volts to one side of the door lock actuators contained in the door latch unit and simultaneously grounds the other side of the door lock actuators. This completes the door lock actuator circuit, causing the door lock actuators to rotate a cam assembly, which then locks the doors. The 12 volts that the CSM provides to the door lock actuators are provided to both door lock actuators from a single pin on the CSM electrical connector.
The Door Switch Unlock Function When a door lock switch is moved into the unlock position, the door lock switch grounds the unlock circuit input to the CSM. The CSM then provides 12 volts to the opposite side (relative to locking the door) of the door lock actuator(s) contained in the door latch unit and simultaneously grounds the other side of the door lock actuator(s). This completes the door lock actuator circuit, causing the door lock actuator(s) to rotate a cam assembly in the opposite direction, which the unlocks the door(s). The 12 volts which the CSM provides to the door lock actuator(s) are provided to each door lock actuator from the individual pins on the CSM electrical connector.
--------------------------------------------------------
CSM Self-Test The CSM has a self-test which can be entered into by using a diagnostic tool. This self-test will monitor the following CSM door lock inputs:
  • Unlock switch (DTC B1311)
  • Lock switch (DTC B1300)
  • Exterior lock switch (DTC B1309)
  • Exterior unlock switch (DTC B1341)
Before running the self-test, the following conditions must be met:
  • The ignition switch must be in position II
  • The driver and passenger doors must be unlocked
  • The driver and passenger doors must be opened
  • The hood and liftgate must be closed
  • The set/reset switch, and liftgate release switch are not actuated
It is important to note that all of the diagnostic trouble codes (DTCs), with the exception of B1551 and B1553 can be retrieved with the self-test. DTCs B1551, and B1553 are continuous and will only be retrieved if the liftgate release is operated prior to retrieving the continuous DTCs.
Inspection and Verification
  1. NOTE: Make sure that the battery is fully charged before starting electrical diagnosis.
    NOTE: Prior to carrying out the CSM Self-Test, make sure that both the driver and passenger doors are open.
    Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Binding latch mechanisms
  • Binding linkage
  • Misaligned door
  • Central junction box (CJB) fuse(s)
  • Wiring harness
  • Electrical connector(s)
  • Door lock switch(es)
  • Door lock actuator(s)


Module Controlled Functions
The central security module (CSM) covers the following functions:
  • Central door locking
  • Double door locking
  • Anti - theft alarm incorporating
    • forced entry
    • radio theft
  • Radio frequency remote control of
    • central door locking
    • panic alarm
    • driver door unlock
    • liftgate unlock
For additional information, refer to Section 419-01A Anti - Theft - Active, Section 501-14A Handles, Locks, Latches and Mechanisms, and Section 501-14B Keyless Entry/Computer Operated Locks.

The CSM is in the passenger side kick panel I think.

Good luck

Jan 25, 2011 | 1999 Mercury Cougar

1 Answer

How to take out the light assy on a 2004 Toytota sienna van.RH side. Do you have to take off the front cap (bumper)


Yes....herer is the steps to replacing it:

Headlight Assembly Removal & Installation Standard Headlights To Remove:
  1. Disconnect the battery ground cable.
  2. Remove the left and right front inner fenders. Fog light & headlight assembly (exploded view) toyota-06-00-5662.gif

  3. Remove the 8 screws and separate the front splash shield from the front bumper fascia.
  4. Remove the 5 push-pins from the top of the fascia grille.
  5. Release the retainers on the left and right sides of the front bumper fascia and pull the fascia toward the front of the vehicle.
  6. Disconnect the headlight assembly connectors.
  7. Remove the mounting bolt, 3 screws and headlight assembly.
  8. Turn all bulb sockets counterclockwise to remove.
To Install:
  1. Turn all bulb sockets clockwise to install.
  2. Align the retainers with the slots and install the front fascia.
  3. Install the 5 push-pins on top of the fascia grille.
  4. Install the front splash shield on the front bumper fascia with the 8 screws.
  5. Install the left and right front inner fenders.
  6. Connect the battery ground cable.
  7. Vehicles with power windows perform the following steps:
    • Turn the ignition switch on.
    • Open the power window halfway.
    • Close the window and continue to hold the switch up for at least 1 second after the window is closed.
    • Ensure that the auto up/down circuit is operating properly.
    • If the auto up/down circuit does not operate, disconnect the battery ground cable for 10 seconds.
    • Connect the battery ground cable.
    • Turn the ignition switch on.
    • Open the power window halfway.
    • Ensure that the auto up/down circuit is operating properly.
    • If the auto up/down circuit does not operate, turn the ignition switch on.
    • Open the power window halfway.
    • Close the window and continue to hold the switch up for at least 12 second after the window is closed.
  8. Vehicles with sliding roof system perform the following steps:
    • Turn the ignition switch on.
    • Press and hold the TILT UP switch until the glass tilts to the full up position. The glass will automatically tilt slightly down after it reaches the up position.
    • Release the switch.
    • If the sliding roof does not operate properly, replace the sliding roof ECU.

May 07, 2009 | 2004 Toyota Sienna

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