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Turn on Headlights and low beam headlamps go very dim, switch to high beam and one headlight comes on while other goes out. They worked before this happened and headlamps were replaced. What could the

Replaced headlamps. Turn switch on and the headlights go so dim that cannot see at night as if daylight driving lights are on. Checked wiring "fine", What next?

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6ya6ya
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Posted on Jan 02, 2017

thutson66
  • 96 Answers

SOURCE: Left low beam is dim

The mechanic didn't hook up the ground wire. The system is using the other light as it's ground and when this happens it causes the other light to go out.

Check the ground wires

Posted on Aug 24, 2008

  • 176 Answers

SOURCE: 1998 cavalier headlights will not work. low or

check wiring in the front bumper for corrosion big problem relating to cavalier and sunfire

Posted on Mar 30, 2009

  • 69 Answers

SOURCE: No headlights. Low beam out High beam work. I

could be becauce if you dont have low beams and high beams do work once you replace them with new bulbs low beams should work.

Posted on Sep 24, 2009

  • 564 Answers

SOURCE: headlights quit working. but all other lights work

sounds like a head light switch,,,

Posted on Apr 19, 2010

  • 1311 Answers

SOURCE: Low Beam headlights won't come on at night, but

Most likely Relay #46 in the underhood fuse panel is bad, try swapping it with #45 to isolate problem.

Posted on Sep 05, 2011

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2 Answers

Driver side headlight goes dim on high beam while passenger side is bright


bad connection or bad earth check all connection or bulb

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Driver side low and high beam on but dim. Passenger side low beam normal but high beam on and dim


I would check for the groundwire continuity

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Jan 04, 2016 | Cars & Trucks

1 Answer

Why wont the headights or running lights work on my 2002 Buick LaSabre?


There are several reasons why your headlamps an running lights don't work , the headlamp switch is a good one ,plus relays an the DIM - dash integrated module an associated wiring ! Here is how the headlamps work , right out of Buick factory service info !
The dash integration module (DIM) provides battery positive voltage to the signal circuits of the headlamp switch. The signal circuits include the headlamp switch headlamps on signal, the flash to pass switch signal and the high beam input. With the headlamp switch in the ON position, a ground path is available for the headlamp switch headlamps on signal circuit of the DIM through the headlamp switch. The DIM provides ground to either the headlamps high beam relay control circuit or the headlamps low beam relay control circuit of the low beam circuit. The position of the headlamp dimmer switch determines which relay control circuit has ground. The DIM supplies battery positive voltage to the relay control circuits, if the headlamps are necessary. The fuse block - underhood supplies battery positive voltage to both relay switch circuits. When the low beam relay control circuit is energized, current flow is to both low beam fuses and to the low beam headlamps. The headlamps have ground at G103 and at G401. When the headlamp high beam relay control circuit is energized, current flow is to both high beam fuses and to the high beam headlamps. The high beam circuit is divided into a left and right side circuit. The current flow of the left high beam is from the fuse to the left high beam lamp. From the lamp, the current flows to the normally-closed contact of the DRL relay to G103. The current flow of the right high beam is from the fuse to the right high beam lamp. From the lamp, the current flow is to ground at G401. When the headlamp dimmer switch lever is pulled toward the driver, the flash-to-pass switch closes. This grounds the DIM flash to pass switch signal circuit. In response to this input, the DIM energizes the HDLP HI BM relay. Both high beams remain on until the driver releases the switch handle. If the low beam headlamps were on during a flash to pass operation, the low beams remain on. The headlights may be switched to high beam with the opposite movement of the headlamp dimmer switch lever.
By running lights , do you mean park lamps or day time running lamps ?
Park, Tail, License and Marker Lamps
The park lamps, including the license lamps, are turned on when the headlamp switch is placed in the PARK or ON position or anytime the headlights are requested. The fuse block - rear supplies battery positive voltage to the switch contacts of the Park LP relay. When the headlamp switch is in PARK or in ON, the park lamp switch on signal circuit of the DIM has a ground path. The DIM provides battery positive voltage to the control circuit of the Park LP relay. When the park lamps and/or the tail lamps are ON, the DIM energizes the park lamp relay control circuit. This closes the switch contacts. Current flows from the Park LP relay to the LH PARK LP and the RH PARK LP fuses. From the fuse, the current flows to the park lamps. The left park lamps are grounded at G103, G401 and G402. The right park lamps and the right tail lamps are grounded at G103 and G401. The DIMR fuse supplies battery positive voltage to the license lamps and to the DIM instrument panel lamp fuse supply voltage - 1 circuit, for interior lamps dimming. The license lamps are grounded at G401.
The best advice I can give is that you take this to a ASE certified professional repair facility unless your a qualified automotive electric repair person !
Diagnostic Starting Point - Lighting Systems
Begin the system diagnosis with the Diagnostic System Check - Lighting Systems . The Diagnostic System Check will provide the following information:
?€¢
The identification of the control modules which command the system


?€¢
The ability of the control modules to communicate through the serial data circuit


?€¢
The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

The

Mar 15, 2015 | 2002 Buick LeSabre

1 Answer

Oldsmobile intrigue problems


The switch is bad >
Each headlamp is individually fused so that battery voltage is applied to the individual lamps at all times through circuit 1640 for the LH headlamps and through circuit 1740 for the RH headlamps. When the headlamp switch is in HEAD, the ground is applied directly to headlamp switch through circuit 1750. When the headlamp switch is placed in LOW, ground is applied to the low beam headlamps through circuit 1201. When the headlamp switch is placed in HIGH, ground is applied to the high beam lamps and to the high beam indicator through circuit 1200. The high beam indicator is fused so that battery voltage is applied at all times through circuit 640.

The box you hear the click in is the daytime running lights control module .
Do you know how to do electrical testing using a DVOM- digital volt ohm meter or a test light ?

Low and High Beams Headlamps Inoperative
Step
Action
Value(s)
Yes
No
1
Was the headlight system check performed?
--
YES - Go to Step 2
NO - Go to Headlight System Check
2
Does flash to pass function normally in the headlight system check?
--
YES - Go to Step 3
NO - Go to Step 7
3
Does the autolamps low and high beam operate normally?
--
YES - Go to Step 4
NO - Go to Step 6
4
Turn the headlamp switch to the Head position and the headlamp dimmer switch to Low position.
Using a test lamp, backprobe between connector C201 terminal W and ground.
Is the test lamp on?
--
YES - Go to Step 5
NO - Go to Step 6
5
Repair poor connection or open in circuit 1750 between connector C201 terminal W and S283.
Is the repair complete?
--
Go to Headlight System Check
--
6
Replace the headlamp switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle for service procedure.
Is the repair complete?
--
Go to Headlight System Check
7
Repair poor connection or open in circuit 1750 between S283 and ground.
Is the repair complete?
--
Go to Headlight System Check

May 13, 2017 | Cars & Trucks

1 Answer

Lights will not turn on


HEADLIGHTS NOT WORKING


It can be faulty headlight switch or issue with its wiring. Or its faulty head light fuse.


==========

To troubleshoot the issue i suggest you few help links with appropriate solution. So you can follow the test and confirm what exact problem is there in your case of headlights not working:-----

Click the link below: -----


All headlights not working?

http://repairhelpcenter.blogspot.com/2012/01/all-headlights-not-working.html

----------

Working of Headlight switch?
------------
Both headlight bulbs blow together?

------------
Car headlight bulbs don't last long?

---------------

2007 Dodge Caliber: Low Beam Headlight Not working

http://technoanswers.blogspot.in/2012/06/2007-dodge-caliber-low-beam-headlight.html

----------

2003 Toyota Camry: Headlights Work Intermittently?

http://technoanswers.blogspot.in/2012/04/2003-toyota-camry-headlights-work.html

----------

Chevy Tahoe: Low Beam Lamps are not working?

http://technoanswers.blogspot.in/2012/04/chevy-tahoe-low-beam-lamps-are-not.html

----------

2001 Chevrolet Tahoe: Headlights not coming ON?

http://technoanswers.blogspot.in/2012/04/2001-chevrolet-tahoe-headlights-not.html

--------

2004 Dodge Ram: High Beam Light is DIM?

http://technoanswers.blogspot.in/2012/04/2004-dodge-ram-high-beam-light-is-dim.html

----------

2001 Chevrolet Tahoe: Both Low Beam Lamps Not Working?

http://technoanswers.blogspot.in/2012/04/2001-chevrolet-tahoe-both-low-beam.html

------------

Low beam headlights Modification?

http://schematicsdiagram.blogspot.in/2012/04/low-beam-headlights-modification.html

---------
How to Replace a Headlight

http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-headlight.html

------------
How to Replace a Headlight Bulb


http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-headlight-bulb.html

-----------
How to Replace a Headlight Switch

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-headlight-switch.html

----------
How to Replace a Headlight Assembly

http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-headlight-assembly.html


How to Replace a Park Light Assembly

http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-park-light-assembly.html

-----------

Low beam headlights Modification?

http://schematicsdiagram.blogspot.in/2012/04/low-beam-headlights-modification.html

----------

Headlight Assembly Removal On Honda Accord

http://technoanswers.blogspot.in/2012/06/headlight-assembly-removal-on-honda.html

---------------

Honda Headlight Assembly Removal
http://schematicsdiagram.blogspot.in/2012/06/honda-headlight-assembly-removal.html

-----------

How to Replace a Headlight Door

http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-headlight-door.html

----------

How to replace HID headlight bulbs for lexus 400h?

http://schematicsdiagram.blogspot.com/2012/01/how-to-replace-hid-headlight-bulbs-for.html

----------------

These will help.

Thanks.

Nov 28, 2012 | 1986 GMC K1500

1 Answer

2001 GMC Sierra 1500 - When i turn lights on the driver side low beam works fins but the high beam is dim - both headlights high/low on passenger side are dim. When i put full beams on the drivers side on...


Sounds like a gound problem to me. Check you headlamp grounds. The ground circuits for your headlamps actually go through the underhood fuse block, then to the headlamp switch, then through Splice Pack #SP203 (Located under the left side of the dash it is bolted to the left "A" pillar) , then to ground #G200. (Which is actually the bolt that is holding the splice pack.) I have seen corrosion in the splice packs several times. You may want to disassemble it and clean the terminals. A LIGHT coat of dielectric grease usually works pretty good to prevent it from doing it again.

May 01, 2011 | GMC Sierra 1500 Cars & Trucks

1 Answer

My headlight is not working, the driving light is very dim but the high or low beams will not work. the ground wire looks good. what could my problem be?


I don't know what model year your truck is, but is sounds like your headlamp is burned out. You can verify the wiring is working using your test light at the headlight connection. Turn on the headlights and touch the test light to each terminal of the wiring harness when the light switch is on both high and low beam. Two out of the three wires should light up.

Jan 30, 2011 | Chevrolet Chevy Cars & Trucks

1 Answer

98 ford lariat. Headlights stopped working. running lights come on and brake lights and turn signals. checked all fuses under dash and under hood, pulled out headlight switch and it looks fine. note only...


Is this both the high beams and low beams that do not work ?

If you checked all 3 fuses with a meter ( with the headlamp in Low position for both low beam fuses or in high for the high beam fuse ), the next items to test are the MFS ( MultiFunction Switch ) and the main headlamp switch ( test not look at it ).

The main headlamp test chart
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The test chart for the MFS
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Oct 25, 2010 | 1998 Ford F150 Regular Cab

1 Answer

No headlights


You need to start by checking the fuse for your headlights (low beams). The DRL could be be bad, but I have not seen them go out very often.

Jun 08, 2009 | 2002 GMC Safari

1 Answer

1994 ford f-150 with day time running lights headlightnot working


Daytime Running Lamps
The daytime running lamp (DRL) system is designed to turn the high beam headlamps on, with a reduced light output, and without illuminating the high beam indicator lamp in the instrument panel. You have a DRL Module.
The multifunction switch is the stalk on your column.

This is 96 F150 circuit. Don't have 94.

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Symptom Chart, Headlamps HEADLAMPS Condition Possible Source Action
  • Headlamps Inoperative
  • Circuitry open/shorted.
  • Damaged headlamp switch.
  • Blown fuse.
  • GO to Pinpoint Test A .
  • Headlamps On Continuously
  • Circuitry open/shorted.
  • Damaged headlamp switch.
  • GO to Pinpoint Test B .
  • High Beams or Low Beams Inoperative
  • Circuitry open/shorted.
  • Damaged multi-function switch.
  • GO to Pinpoint Test C .
  • One High Beam or One Low Beam Headlamp Inoperative
  • Circuitry open/shorted.
  • Damaged connector.
  • Headlamp bulb damaged.
  • GO to Pinpoint Test D .
  • Flash-to-Pass Inoperative
  • Blown fuse.
  • Circuitry open/shorted.
  • Damaged multi-function switch.
  • GO to Pinpoint Test E .



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Feb 25, 2009 | 1994 Ford F150 Styleside Supercab

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