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High beams stay on with low beams fuso truck fesp

03 mits fuso truck fe-sp high beams and indicater stay on with headlight switch in both positions

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  • 81 Answers

Change the high beam relay it has welded on

Posted on Nov 02, 2012

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: low beam headlights do not work, but high beam headlights do

Clyde,

I've been troubleshooting this same problem on a different vehicle this week, and I can give you the steps I'd take.

1. If both sides went out at the same time, the problem is *NOT* likely to be the bulbs.

2. Check the fuses to see if both low beam lights are on the same fuse. Many cars have one fuse for low beam and another for high beam, so both lights out at the same time typically means fuse blown.

3. If the headlights are OK and the fuses are OK, then the problem is *LIKELY* the headlight switch. In my case, AutoZone has one and it can be installed easily; but in your case, that may not be as simple.

Please post your findings or comments.

Posted on Jul 16, 2008

j_del
  • 1586 Answers

SOURCE: INOP low beam and high beams

The problem is the headlight switch itself - it's one of the most common failures on these cars. The part, brand-new, is about $158 from ECSTuning.com. Replacing it involves removing the airbag and steering wheel - not difficult but a little nerve-wracking due to the power of the airbag.

If this is something you want to tackle on your own, reply back here and I can give you a step-by-step on doing the work yourself. Or you can go to a shop/dealer and just have them do it. They'll probably charge you at least two hours' labor, even though it's a 40 minute job. Let me know what you would like to do.

Posted on Dec 11, 2008

motor1258
  • 6674 Answers

SOURCE: My low beams work on my headlights but my High beams wont come on

Take a look at this link regarding DRL system. I know it's not exact truck but most of it would apply to yours too. It should give you hints on what to test & how.
http://www.fordf150.net/howto/drl.php

Posted on Mar 28, 2009

  • 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

  • 75 Answers

SOURCE: 1993 Chevy Silverado truck headlights high beam only works no low

dimmer switch has gone bad need to change your dimmerswitch

Posted on Apr 01, 2009

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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

1 Answer

Headlights wont turn


sounds like the headlight switch is defective and needs replacing,but you need to check to make sure the rod that the switch pushes against if make the full travel and not short as this will not allow the switch to change from low beam to high beam.if the rod is travelling the full length then the switch is no good.you should also hear a click when moving the arm to go from low to high if not then the switch is bad.by holding the lever at a certain position to get the high beams to work this also indicates a switch problem.

Nov 04, 2013 | Cars & Trucks

1 Answer

03 blazer headlights won't Work. High beam


not sure here but i suspect the steering column stalk control switch as the main possible cause of the fault

May 02, 2013 | Cars & Trucks

1 Answer

I have a 03 gmc 2500 hd im having headlight problems but only sometimes and only when i have to high beams on and I have to switch to low beams the low beams don't come except when you hit a bump in...


Replace the headlight dimmer switch on the steering column and check the connector to it fro signs of overheating, replace connector and switch as one repair. Do not use crimp connectors, solder all wires as needed and use shrink tube to insult the solder joints.

Feb 22, 2012 | 2003 GMC Sierra 2500HD

1 Answer

NO headlights. Could a timing belt issue be the


absolutely not the timing belt has no connection to headlights,first locate and check any headlamp related fuses located in either fuse box underhood or in dash area if no lights on high or low beam may pull headlight bulbs and check unlikely both go bad @ once this may end up being multifunction switch on steering column your turn signal lever is what you pull back on to switch rom high beam to low beam correct? if so this switch can cause your problem

Mar 31, 2010 | 2002 Hyundai Santa Fe

2 Answers

Camry headlights not working


it sounds like a bad light switch

Mar 25, 2010 | 1993 Toyota Camry V6

1 Answer

Low beam burnt out


The headlight on an 03 baja are a double element bulb for high an low beam. I replaced mine with 9007 bulb from auto parts store. Be careful to pay attention to bulb position, they can be installed up side down having the high beam as your low beam. I would shine the lights up against a wall or garage door and flip your high and low beams on and off to see how the shine.

Feb 21, 2010 | 2003 Subaru Baja

1 Answer

My passenger side low beam headlight is out. the driver side low beam headlight works fine. I replaced the bulb and the headlight still doesn't work. What should I look at next?


Check the fuse. There are seperate fuses for right and left. You dont mention if the high beam works for that side? If it does, the fuse is good. The GREEN wire at the bulb is the ground for the low beam. If that wire has power, then the ground is bad. If the high beam works, the hi'lo beam switch is good, and there is a problem between that headlight and the Engine Compartment Junction Block

Dec 16, 2009 | 2004 Hyundai Santa Fe

1 Answer

My bright light indicater is working, but I don't have any bright lights?


So, when u turn on the high-beams, the indicator light goes on, but u still have low beam headlights only? Check the headlight (either one), and see if by chance both high beams burned out at approx. the same time. U don't specify what year, I'm not sure if u have a replacement bulb, or a sealed beam headlight to replace. If the high beams are both ok, then it must be the headlight high beam switch. Let me know what u find.

Nov 05, 2008 | Honda Accord Cars & Trucks

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