Question about 1993 Buick LeSabre

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Headlight relay is location, if underhood witch one is it they are not marked

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Change the switch in colum that will fix it i have the same car

Posted on Dec 29, 2010

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1 Answer

Where is the headlight relay located on a 2000 Honda Accord?


There are two headlight relays in the underhood fuse/relay box.

Jul 14, 2017 | Honda Cars & Trucks

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

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Where is relay located for headlight on 2003 pt cruiser


If this vehicle is equipped with a headlight relay, it should be in the underhood fuse/relay center

May 23, 2015 | 2003 Chrysler PT Cruiser

1 Answer

What causes both cooling fans to not run?


Hi Naomi , there is a lot involved in the control of the cooling fans on your vehicle ! There are three fuse's , three relays an a fan control unit !
1. radiator fan main relay , located in underhood relay box A
2.condenser fan relay , located in underhood relay box A
3.radiator fan relay , located in underhood relay box C
4.Cooling fan fuse # 47 20amp. underhood fuse / relay box
5.condenser fan fuse # 50 20amp in underhood fuse / relay box.
Any one of these could cause them to not work, rather then just replacing parts an wasting money you should take it to the repair shop !

Apr 06, 2015 | 1997 Acura RL

1 Answer

Where is the headlight relay switch?


I think you want to know where the high and low beam headlight relays are located and the answer is in the underhood fuse/relay box

Nov 13, 2012 | 2005 Honda Accord

1 Answer

Witch relay works the headlights on a 98 ford explorer


There is only a headlamp relay for auto lights. If you do not have automatic lights then there isn't a relay for the headlights. If this is what you are looking for there is a "relay module" located under the dash almost in the middle. Below is a picture of the location of the relay module (the 1st picture). Keep in mind that the picture is showing you everything as if you were behind the dash looking from the front of the vehicle so the right side of the picture is the drivers side of the vehicle. I marked its location. Also in the next picture is the relay layout diagram and I have marked which relay is the headlamp relay. Hope this helps.....

11_1_2012_11_38_19_pm.jpg11_1_2012_11_38_35_pm.jpg

Nov 01, 2012 | Ford Cars & Trucks

1 Answer

Headlights no longer come on


You probably have two separate problems. If both your low beam headlights were going on and off, the most likely reason is the low beam headlight relay located in the underhood fuse panel. It is designated as #46. Try switching it with #45 relay, right next to it, for troubleshooting purposes.
For the fog light check relay #39

Jul 02, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

Headlights don't work but high beams and running lights do


Most likely the Low beam relay has failed, it is located in the underhood fuse panel at location #46. To verify it is the relay, take the one out of position #45 and put it in position #46 temporarily.

Jul 22, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

2004 trailblazer. Low beam headlights go out while driving at night for no apparent reason. Saw other posts like this on other sites. How do I fix it and are they doing a recall for this? Thanks


I read over the recalls and they do have recalls on brake and turn signal lights but not the low beam headlights while driving at night.

Sounds like the relay or headlamp driver module relay 46, for the headlights is going bad, though.
Or, it could alternatively be bad grounding of wire somewhere or bad wiring in general.

I would check in the underhood fuse box for the relay and see if wiggling it to ensure a good connection helps matters.


Underhood Fuse Block 4.2L Engine Except Saab Underhood Fuse Block (2002 - 2005 Early Production) gm-06-42-1628.gif

Underhood Fuse Block (2005 Late Production - 2007) gm-06-42-1629.gif

Saab Underhood Fuse Block (2005) gm-06-42-1630.gif

Underhood Fuse Block (2005 - 2007) gm-06-42-1631.gif

5.3L Engine Except Saab Underhood Fuse Block (2003 - 2005 Early Production) gm-06-53-1632.gif

Saab Underhood Fuse Block (2005) gm-06-53-1633.gif

Underhood Fuse Block (2006 - 2007) gm-06-53-1634.gif

5.3L & 6.0L Engines Except Saab Underhood Fuse Block (2005 Late Production - 2007) gm-06-53-1635.gif

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Oct 13, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

What fuse controls the horn o a 1996 Chevrolet Astro Van?


the fuse is located in the underhood fuse and relay ELECTRICAL center, it is marked "HORN"

The underhood electrical center is located toward the
rear of the engine compartment on the driver's side.
Lift the hood and open thec over to gain access to this
fuse block.

Aug 18, 2010 | 1996 Chevrolet Astro

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