Question about 1996 Nissan Sentra

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Headlight problems when the ignition is off the left front headlamp remains on

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Likely a short in the wiring.... you need to have someone troubleshoot that as soon as possible.

Robert

Posted on Feb 10, 2009

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Posted on Jan 02, 2017

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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

2 Answers

Left front headlight dim but right front headlight is fine....


Check the ground connection for that headlamp .

May 19, 2017 | Cars & Trucks

1 Answer

Relay fuse for park lamps on 2004 Buick Rendevous. Where is it located?


Park, Tail and Marker Lamps
The park, tail and marker lamps, including the license lamps, are turned on when the headlamp switch is placed in either the PARK or HEADLAMP position, or anytime the headlights are requested. The PARK LPS fuse in the underhood fuse block, supplies battery positive voltage to both the park lamp relay switch contacts and park lamp relay coil circuit. The park lamp relay coil is controlled by the body control module (BCM). When the headlamp switch is placed in the PARK position, the BCM will then energize the park lamp relay coil control circuit. Current flow is now from the park lamp relay to the park/tail lamps. The front park lamps are grounded at G100 and G101. The rear park lamps are grounded at G401 and G402. The license plate lamps are a part of the rear park lamp circuit and are grounded at G401. The inadvertent power control feature prevents the park lights from remaining on more than 10 minutes if left on. If the park lights are turned on after the ignition switch has been turned OFF, or is in the ACCY position, they will remain on until turned off or the battery runs dead.

20
PRK LPS
15A
PRK LPS Relay 55 under hood fuse box . Should have diagram on inside of the fuse box lid .

Feb 22, 2017 | Buick 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

2001 Monte Carlo SS 3.8 v6 Rear park lights are out as well as the dash lights, brake lights work headlights work front running and park lights work, all turn signal lights work. replaced headlight switch...


Park, Tail, Marker Lamps, and License
The park, tail and marker lamps, including the license lamps, turn on when the headlamp switch is placed in either the PARK or the HEAD position, or anytime the headlamps are requested. The RT I/P #1 fuse in the RH I/P fuse block supplies battery positive voltage to both the park lamp relay switch contacts and to the park lamp relay coil circuit. The park lamp relay coil is controlled by the body control module (BCM). When the headlamp switch is placed in the PARK position, the BCM energizes the park lamp relay coil control circuit.
Current flows from the park lamp relay switch to both front and rear park lamp fuses and to their respective park/tail lamps. The front park lamps are grounded at G101. The rear park lamps are grounded at G302. The license plate lamps are a part of the rear park lamp circuit and are grounded at G302. The inadvertent power control feature prevents the park lamps from remaining on more than 10 minutes if left on. If the park lamps are turned on after the ignition switch has been turned OFF, or is in the ACCY position, they will remain on until turned off or until the battery runs dead.

Did you the REAR PARK LP fuse 15 amp in the right insturment panel fuse box.

Jul 18, 2017 | 2001 Chevrolet Monte Carlo

1 Answer

How do you replace the bulbs in the headlamp on a audi A8 2004


The front bumper must be removed. After it is removed there are three Hex bolts securing the headlamp to the car. 2 visible (1) not so visible resides in a hole on the right of the drives lamp, left on the passanger lamp. Ensure you disconnect the battery PRIOR to starting this job. If you are replacing HIDs the ballast should be your first choice, then bulbs.
Here is the information on the bulb:
HID Lamp (Low Beam), Replacing
WARNING:HIGH VOLTAGE.Always disconnect negative (-) battery terminal prior to servicing any parts of the HID lamp system marked with the yellow "HIGH VOLTAGE"symbol.After disconnecting battery, briefly turn headlights on and off in order discharge any residual voltage.
CAUTION:
Before beginning repairs on the electrical system:

· Switch off all electrical consumers.
· Switch ignition off and remove ignition key.
· Disconnect negative (-) battery terminal.
· When disconnecting and reconnecting battery terminals, observe all applicable Notes and torque specifications, as well as instructions on performing OBD program and electrical system function .
Removing.Activate "jacking" mode.Disconnect battery.Remove appropriate front wheel.Remove front left wheel housing liner.
Loosen locking bolt -1- a few turns.
Release retainer tabs -arrows- and remove housing cover for low beam from headlight housing.Disconnect electrical connector -1- at ignitor.
Turn ignitor -2- counter-clockwise -arrow- and remove.Disengage spring clip -1-.
Remove HID lamp -2- from headlight housing.

Mar 19, 2010 | 2004 Audi A8

2 Answers

Audi A4 2002 Low beams & Right front turn signal stopped working


For Audi A4 the fuse box is located on the left side of dashboard behind a plastic cover (for left hand steering wheel vehicle). On inner face of the plastic cover you will find the fuse diagram.
First fuse on first row from left upper corner is Fuse Nr.20 = F20 (15A) - RH headlamp low beam, headlamp adjustment.
First fuse on second row from left upper corner is Fuse Nr.21 = F21 (15A) - LH headlamp low beam, headlamp adjustment.

Feb 15, 2010 | 2002 Audi A4

1 Answer

No power to left front headlamp - low beam


There are relays that control the headlights in a fuse box under the hood near the firewall.. There's also a fuse box underneath the dash on the driver's side, but can't remember if it's on the underside of the dash or beside it

Jul 27, 2009 | 2004 Lexus RX 330

1 Answer

Driver's headlight is dim; wipers only work if headlight is off


Sounds like the jolt from the barrier has caused a bad ground to occur. Look for a bad ground wire around the left headlamp in or around the headlight bucket.
Tighten or replace the bad ground wire. A poor contact will cause the headlight to light dimly.

Mar 03, 2009 | 2008 Ford Focus SE Sedan

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