Question about 2000 Buick LeSabre

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Headlamps stay on 5 minutes or more when car is turned off and locked. Headlamp switch doesn't seem to turn them on or off.

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You don`t say but if your car has a delay timer for the headlights then this could be the problem,it is built part of the headlight switch and to repair you replace the headlight switch itself with the same switch.some of these cars also had an daylight sensor in the dash that would detect how much daylight there is and when it gets dark enough it automaticaly turns on the headlights.this system was first installed on the cadillac cars then filtered down to other models in the gm line.its someplace to start.

Posted on Apr 06, 2011

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1 Answer

2007 chev sub head lights wont turn on


Do you know anything about automotive electronics ? Electronic control modules .
Headlamp ON/OFF control is determined by the body control module (BCM) by a signal on the headlamp switch on input circuit when the headlamp switch is in the HEAD position. When the headlamp switch is in the AUTO position, the BCM determines headlamps ON/OFF by the voltage from the ambient light sensor.
If the headlight switch is left in the ON position, the inadvertent power control feature will turn OFF the headlights approximately 10 minutes after the ignition switch is turned to the OFF position. If the driver places the headlight switch in the ON position after the ignition switch has been turned OFF, or if the ignition switch is in the ACCY position, the headlights will remain ON until turned OFF or the battery runs dead.
The high beam indicator is illuminated when the instrument cluster receives a GMLAN serial data message from the BCM that the high beams are illuminated.
High Beams
The high beam headlamps receive voltage from the headlamp high relay located in the underhood fuse block. The BCM controls the relay on the headlamp high beam relay control circuit. High beam control is determined by a signal on the headlamp dimmer switch signal circuit from the multifunction switch. When the headlamp dimmer switch signal circuit is grounded, the BCM grounds the headlamp high beam relay control circuit, illuminating the high beam headlamps. The right and left high beam circuits are independent and are fused independently in the underhood fuse block.
Low Beams - Standard
The low beam headlamps receive voltage from the headlamp low beam relay located in the underhood fuse block. The BCM controls the relay on the headlamp low beam relay control circuit. Low beam control is determined by a signal on the headlamp dimmer switch signal circuit from the multifunction switch. When the headlamp dimmer switch signal circuit is open, the BCM grounds the headlamp low beam relay control circuit, illuminating the low beam headlamps. The right and left low beam circuits are independent are fused independently in the underhood fuse block.

Hooking up a factory scan tool an checking DTC'S - diagnostic trouble codes would be the very first step in trouble shooting this problem .
DTC B257A 00: Headlamp Switch Input Signal Mismatch
DTC 2575 00: Headlamp Control Circuit

Jun 30, 2017 | Cars & Trucks

1 Answer

My mph and temperature control lights blink along with my headlights. headlights also do not come on when car is started and then do not stay on like before until I open the door.05 buick lacrosse


Your headlamps , instrument cluster lights , warning lights , gauges etc... are all computer controlled in some way . Could have DTC'S - diagnostic trouble codes stored in various modules on your vehicle ! That is always the first place to start. This problem if no DTC'S are stored , checking the affected electrical circuits for shorts , opens , high resistance etc... would be a good next step . Also checking power and grounds of controlling module , in this case the BCM - body control module .

The body control module (BCM) applies a pulse width modulated (PWM) voltage to the headlamp module and high beam relay in the underhood fuse block. The ground for the headlamp module is supplied from G113 or G115. For normal manual low beam operation when the headlamp switch is place in the HEAD position, ground from G202 is applied through the headlamp switch and to the BCM through the headlamp switch headlamps ON signal circuit. The BCM then applies a PWM voltage to the headlamp module/high beam relay voltage supply circuit. The headlamp module then applies battery positive voltage through the left front (LF) and right front (RF) LO Beam fuses to the left and right low beam headlamps. The ground for the left headlamps is supplied by G101 and the ground for the right headlamp is supplied by G100.
For high beam operation, ground is applied at all times to the headlamp dimmer switch from G202. When the headlamp dimmer switch is placed in the HIGH position, ground is then applied through the headlamp dimmer switch signal circuit to the BCM. The BCM then applies a ground to the headlamp high beam relay control circuit. This energizes the HI Beam relay, the relay then applies battery positive voltage through the LF and RF HI BEAM fuses to the LF and RF high beam headlamps. The ground for the left headlamps is supplied by G101 and the ground for the right headlamp is supplied by G100.
The BCM then sends a class 2 message to the instrument cluster in order to illuminate the high beam indicator lamp. If the headlamp switch is left in the HEAD position, the inadvertent power control feature will turn OFF the headlamps after 10 minutes after you turn the ignition switch to the OFF position. If you place the headlamp switch in the head position after the ignition switch has been turned OFF, or if the ignition switch is in ACCY position, the headlamps will remain ON until you turn them OFF or until the battery runs dead.

Jan 17, 2017 | Cars & Trucks

1 Answer

Hi my name is Larry I have a 1998 Pontiac sunfire & my problem that I have is I have low beam. But no high beam.


It's probably the switch , but testing to know for sure is alwasy a good idea .

Headlamps Inoperative - High Beams
Step
Action
Value(s)
Yes
No
1
Did you perform the Daytime Running Lamps (DRL) System Check?
--
YES - Go to Step 2
NO - Go to Daytime Running Lights (DRL) System Check
2
Disconnect the turn/hazard headlamp switch connector C1.
Connect a fused jumper between terminal B of the turn/hazard headlamp switch assembly harness connector C1 and ground.
Do the high beam headlamps operate?
--
YES - Go to Step 3
NO - Go to Step 4
3
Replace the turn/hazard headlamp switch assembly.
Did you complete the repair?
--
Go to Daytime Running Lights (DRL) System Check
--
4
Repair the open in CKT 1200 between the turn/hazard headlamp switch assembly. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?

Daytime Running Lights (DRL) System Check
Step
Action
Normal Result(s)
Abnormal Result(s)*
1
Turn the headlamp switch to the HEAD position.
Turn the headlamp dimmer switch to the LOW position.
The low beam headlamps are ON.
The high beam headlamps are OFF.
Headlamps Inoperative - Low Beams
2
Turn the headlamp switch to the HIGH position.
The high beam headlamps are ON.
The high beam indicator is ON.
The low beam headlamps are OFF.
Headlamps Inoperative - High Beams
3
Turn the headlamp switch OFF.
Turn the ignition to ON.
Disengage the parking brake.
The high beam headlamps come ON at a reduced intensity in approximately 30 seconds.
Daytime Running Lamps (DRL) Inoperative, Headlamp Switch Operates Normally
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.

Jan 13, 2017 | 1998 Pontiac Sunfire

1 Answer

My lights will not shut off on my pontiac grand prix 03


Headlamp Low or High Beams Always On

1

Was the Lighting System Diagnostic System check performed?
Go to Step 2
Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the ignition switch to the OFF position.
  2. Turn the headlamp switch to the OFF position.
Are any of the headlamps on?
Go to Step 3
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

Disconnect the headlamp switch.
Are the headlamps on?
Go to Step 4
Go to Step 8

4

Disconnect the multifunction turn signal switch.
Are the headlamps on?
Go to Step 6
Go to Step 5

5

Test for a short to battery positive voltage in the headlamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES Go to Step 10
NO Go to Step 7

6

Test for a short to battery positive voltage in the headlamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES Go to Step 10
NO Go to Step 9

7

Replace the multifunction turn signal switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.
Did you complete the replacement?
YES Go to Step 10

8

Replace the headlamp switch. Refer to Headlamp Switch Replacement .
Did you complete the replacement?
Go to Step 10

9

Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.
Did you complete the replacement?
Go to Step 10
--

10

Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2

Jun 21, 2016 | Pontiac Cars & Trucks

1 Answer

98 cad deville headlights stay on headlight & twilight sentinel switch is off along with the ign. i'm stumped can you help. Ted


Did you check the high/ low beam headlamp relay ? Stuck contacts in side relay .Plus headlamp relay an DRL relay .All are located in the underhood relay center .
The headlamps are controlled by the body control module (PZM). The battery positive voltage (B+) is applied at all times through the HDLPS fuse at the switch side of the headlamp relay via CKT 340 (ORN).
Battery positive voltage (B+) is also applied at all times through the RADIO/PHONE fuse to the coil side of the high/low beam headlight relay via CKT 40 (ORN/BLK). Both relays are controlled by the PZM at separate output cavities.

When the headlamp switch is in the HEAD position, the instrument cluster headlamp switch input is grounded through CKT 10 (YEL) and the headlamp switch. The instrument cluster sends a request through the Class 2 serial data line to the BCM in order to active the low beam headlamps. The BCM supplies positive battery voltage (B +) to the coil side of the headlamp relay via CKT 352 (WHT). The coil receives ground through the headlamp switch via CKT 10 (YEL). The coil of the headlamp relay is then energized, closing the switch contacts. Battery positive voltage (B +) is then applied through the high/low beam headlamp relay via CKT 1346 (LT BLU) and the L HDLP LO fuse and R HDLP LO fuse via CKT 12 (TAN) to the left and the right low beam headlamps respectively.
This may sound pretty complex .
1
Was the Headlights System Check performed?
--
YES - Go to Step 2
NO - Go to Headlight System Check
2
Are the park lamps also on?
--
YES - Go to Step 3
NO - Go to Step 13
3
Connect a Scan Tool to the data link connector (DLC).
Inspect the IPC headlamp switch input.
Does the headlamp switch operate properly?
--
YES - Go to Step 4
NO - Go to Step 10
4
Disconnect the instrument cluster (IPC) connector C3.
Do the headlamps and park lamps turn off?
--
YES - Go to Step 5
NO - Go to Step 6
5
Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
Is the repair complete?
--
Go to Headlight System Check
Is the repair complete?

6
Disconnect the body control module (PZM) connector C2.
Do the headlamps and park lamps turn off?
--
Go to Step 7
Go to Step 8
7
Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control System.
Is the repair complete?
--
Go to Headlight System Check
--

Your best bet is to take it to the dealer .

Mar 18, 2016 | Cars & Trucks

1 Answer

Why won't the headlamps turn off?


Maybe a stuck relay or bad headlamp switch ! You may have a DTC - diagnostic trouble code stored in the BCM - body control module ! These codes do not turn on the check engine light ! There could be a yellow wrench symbol on the instrument cluster or a service vehicle soon light or a message in the message center if yours has one ! You would need a professional grade scan tool to check for codes in the BCM !
DTC B2578 Headlamp Relay Control Circuit High.
DTC B2577 Headlamp Control Circuit Low.
DTC B2575 Headlamp Control Circuit !
If no codes were found you would need to do some tests ,such as these .
If no codes Headlamp Low or High Beams Always On test

2

  1. Ensure that the ambient light sensor is receiving enough light to simulate daylight conditions.
  2. Place the headlamp switch in the OFF position.
  3. Turn ON the ignition, with the engine OFF.
  4. Turn OFF the ignition.
Do the headlamps operate normally?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3

3

Are the headlamps ON with the ignition key ON, and then turn OFF when the ignition key is placed in the OFF position?
Go to Step 4 yes
Go to Step 5 no

4

Test the headlamp relay control circuit of the body control module (BCM) for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 15 yes
Go to Step 10 no

5

Disconnect the headlamp relay. Refer to Relay Replacement in Wiring Systems.
Do the headlamps turn OFF?
Go to Step 8 yes
Go to Step 6 no

6

Disconnect the headlamp switch connector.
Do the headlamps turn OFF?
Go to Step 7 yes
Go to Step 11 no

7

Test the headlamp relay output circuit of the headlamp relay for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 15
Go to Step 9

8

Inspect for poor connections at the harness connector of the headlamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems?
Did you find and correct the condition?
Go to Step 15
Go to Step 12

9

Inspect for poor connections at the harness connector of the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 15
Go to Step 13

10

Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 15
Go to Step 14
This mite be a problem you would want to leave to a ASE certified Technician who has the tools an knowledge ! Probably could be fix in less then an hour !

Jul 16, 2015 | 2005 Chevrolet Equinox

1 Answer

What causes my 1996 toyota corolla headlamps stay on constantly even when you turn them off at the switch?


It seems like you have a bad switch. Are any of the other lights on? you may also have a short feeding the power to the headlamps. Need to check.

Mar 18, 2015 | 1996 Toyota Corolla

1 Answer

2005 Jaguar XJ8, headlamp issue/malfunction, when the headlamp switch is in the delay position the headlamps come on multiply times long after you have left the car, when driving with the lamps in the on...


check your battery connections, and cable connections for battery are making a good connection, also check that your lighting connections are good; providig proper current

Nov 04, 2013 | Jaguar Cars & Trucks

2 Answers

Headlights will not shut off after the car has been shut off the only way to shut them off is to disconnect the battery


Your vehicle is equipped with an "Auto Lamp" system. The headlamps will stay on for as long as 3 minutes depending on how you have the control set. If you are certain that this is not the problem and/or your headlamps will not turn off after 3 minutes, perform these checks:

1. CHECK HEADLAMP SWITCH OPERATION
Ensure that the headlamp switch is off. Disconnect the headlamp switch connectors. If the headlamps go foff, replace the headlamp switch. If the headlamps are still on, go to the next step.

2. CHECK CIRCUIT No. 15
Remove autolamp parking lamp relay from the under hood Power Distribution Center (PDC), near the battery. If the headlamps are off, go to the next step. If the headlamps are still on, repair the short to battery voltage in circuit No. 15 (RED/YELLOW wire).

3. CHECK AUTOLAMP RELAY GROUND CIRCUIT
Remove the autolamp parking light relay from the PDC. Measure the resistance between ground (BATTERY NEGATIVE) and terminal No. 2 (DARK BLUE/ORANGE wire) at the autolamp relay wiring harness connector. If resistance is 5 Ohms or less, continue to the next step. If the resistance is more than 5 Ohms, replace the autolamp relay.

4. CHECK THE LIGHT SENSOR AMPLIFIER
Reconnect all components. Disconnect the light sensor amplifier located in the defroster grille on the top of the dash. If the headlamps are off, replace the light sensor amplifier. If the headlamps are on, repair short to ground in circuit No. 218 (WHITE/PURPLE wire) to the headlamp switch.

May 14, 2011 | 1997 Ford Taurus

1 Answer

1999 olds aurora,headlamps wont turn off,sometimes will blink.


those are problems with the olds light switches, same switch used on other gm vehicles. replace it , new or salvage yard

Sep 18, 2009 | 1999 Oldsmobile Aurora

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