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CR-V::Clinical Rounds Routine maintenance, problems, solutions and repair

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  #1  
Old 02-13-2006, 06:24 AM
jmdriscoll jmdriscoll is offline
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Default Low beams stopped working

Hello, I have done a search on this forum on this subject but get minimal results....

My wife has a 2001 CRV SE with no daytime running lights.

The other week, my her right headlight was not working when she pulled in the driveway. I jiggled the plug at the bulb and it started working. I noticed that the connection did not feel totally firm. So I then unplugged the connector "with the lights on" bent the pins on the bulb just a hair so that the connector will fit snugley.. Ok everything was fine and dandy at this point, and everything was working as it should.

This past Friday, my wife told me that her lowbeams stopped working and that only her high beams work now. I took a look at the under the dash fuses, and see no problems with them. I took some voltage readings at the fuses, and get 12 volts at both high beam fuses when the high beams are on, but I get no voltage at the lowbeam fuses when the lowbeams are on. I left her manual at work, and when I got here today, I notice that there is a relay that I did not account for when looking at it last night. It is a multiplex control unit. After looking at the schematics it seems that with the symptoms that I currently have..."voltage at the high beam but not low beam fuses" that this control unit could have taken a dump on me. Anybody out there ever run into this trouble or know enough about the CRV's electrical system to know what might be going on??? Oh yeah, I checked both bulbs and the filimants look fine.


Thanks in advance,

Mike
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  #2  
Old 02-13-2006, 07:41 AM
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Before replacing expensive parts like the multiplex controller, I would first try replacing the cheap parts (the headlights themselves).

I had both headlights go out once on another car. I wasted an afternoon tearing the wiring harness apart looking for the broken wire when it turned out to be the bulbs. Just good quality control from Sylvania that they both went out at the same time. ;-)

Chip H.
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  #3  
Old 02-13-2006, 08:07 AM
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Default Re: Low beams stopped working

Quote:
Originally Posted by jmdriscoll
My wife has a 2001 CRV SE with no daytime running lights.

The other week, my her right headlight was not working when she pulled in the driveway. I jiggled the plug at the bulb and it started working. I noticed that the connection did not feel totally firm. So I then unplugged the connector "with the lights on" bent the pins on the bulb just a hair so that the connector will fit snugley..
It's the brass lugs inside the plastic connector that are often the troublemaker. Because nobody seems to know that you have to pinch really hard on the two 'diamonds' to make the connector release it's grip on holes in the the lamp's prongs. So we twist and torque and growl until we've freed the connector, but the brass lugs are now bent all out of shape and won't grip tight enough to make a proper connection.

It was possible (on our Odyssey) to pop the plastic connector apart, slip the lugs out and crunch them back into their original snug condition. NOTE: If you run a high current circuit like that while the lugs aren't tight enough, they can burn up fairly quick, and also produce the 'My headlight keeps burning out' symptom, since everything overheats and contributes to the lamp overheating, rather than helping to conduct heat away from the filament.
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  #4  
Old 02-13-2006, 08:25 AM
jmdriscoll jmdriscoll is offline
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Good point with the bulbs themselves. I did pull both bulbs and found that the filimants are not burnt or broken. Although....I did check for voltage across the lowbeam fuses and I have none. that tells me that the break is before the bulbs....so nevermind...scratch that idea. One thing though....I have a Chiltons Manusl for the CVR and I HATE this manual with a passion because it covers the Civic and CRV 2001-2004. the reason that I hate this soooooo much is #1 the CRV had a redeign in 2002.... and #2 the manual is not in depth enough as it covers 3 different cars...civic, 2001 crv, and 2002-2004 crv... ARRRGH!!!! I was looking at the factory service manuals for the 2001 CRV specifically and they are $90. I need to buy one, but I hate to buy this expensive Factory service manual for $90 only to find that I need to replace a $160 part. I could probably take it to a shop and have it fixed fast and cheaper by the time I do all of that. ARRRGH!!!


Ok, I'm done with my ARRGHS!!! and back to logic mode. My manual's electrical schematics do not show where the fuse box is in relation to the multiplex control module and the actual light switch.... So being that I do not have any voltage at my fuse box for my lowbeams when the switch is in the on position, it would help greatly to know where this fuse is in relation to the switch and the mux control unit. I have read that the mux control unit is in the fuse box. I called the dealership and they say that it is an interchangable part. they gave me a price of $125 for the actual headlight switch, and a price of $163 for the Multiplex control unit. So it would help if I knew exactly what was wrong before ordering any of these parts. Anybody, know exactly where this Multiplex control unit is located at or around the fuse box? pictures? anything?

My connector at the light switch also comes apart.... It has 3 wires total...

1) 1 thicker red wire that runs straight back to the headlight relay power

2) 2 smaller wires that run back to the mux control unit. one for the high beams, and one for the lowbeams. I was thinking of pulling a magiver move and reversing these wires to give her only lowbeams but no high beams only until I can segment the trouble down to one component.


Thanks for the quick responses, and keep the ideas coming... We can let those darn dealers get the best of us magiver minded consumers with their high prices and troubleshooting rates!!!
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  #5  
Old 02-13-2006, 09:05 AM
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blueiedgod blueiedgod is offline
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check for voltage on the low beams at the plug. Even if the filaments look OK, they may still be burnt out. Or just plug a bulb that you know works in the harness without installing it in the headlight. Like Curly said, replace the inexpensive parts first. And then, by process of elimination, arrive to the more expensive ones.

link
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Old 02-13-2006, 09:47 AM
jmdriscoll jmdriscoll is offline
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True, I'll check that when I get home. I left the service manual at work and did not know what wire was what at the time. now I know, so I will look at that tonight.

On the flip side, I called a local shop that I trust pretty well and have used for other stuff over the years. The guy there said that they will look at it and that they charge a LOT lower prices on parts than what the dealer will sell to the consumer for. So I will go home and try one more round of troubleshooting, with service manual in hand...and If I have no luck, I will take it in to them.
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  #7  
Old 02-13-2006, 09:58 AM
jmdriscoll jmdriscoll is offline
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btw blueiedgod, I like that little tidbit of info that you have attached to your posts depicting IP, OS, and IE version...Do you do some sort of IT work? Nice to know though that it is my NAT "public" address and not my private address. ...I have had many debates with others regarding IP traceability through forum postings. I was a member of a club for a couple of years... and once I decided to not renew, I stirred the pot a bit with REAL issues that the club did not want to address and that they get all fiesty over... A buddy of mine told me that they are going to trace my IP and come and kick my butt. I always argue that they trace back to the NAT'ed address and that the private network address are exactly that... Private within the organisation that you either work for or through the ISP that gives you the service. I also argue that they are not willing to give out user info or real IP addresses unless you are breaking the law and request the info through a court order... Gotta love those privacy laws!!!
Where did you get that little app by the way? did you write it yourself or is it something that you downloaded?
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  #8  
Old 02-13-2006, 10:00 AM
jmdriscoll jmdriscoll is offline
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actually I just went to danasoft and see the answer... Is that your site? or is that where you got the app from?
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  #9  
Old 02-13-2006, 12:06 PM
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blueiedgod blueiedgod is offline
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Nah, I just got it from Danasoft. One guy here, Rich, is really freaked out by this. :-) If you read the explanation on how the utility works, there is nothing to worry about. :-)

It stops people from doing stupid things. We had a few people logging in annonymously and posting inflamatory remarks (when I do it, I am not hiding behind the perceived annonymity of the internet). If they truly believed in what they were preaching, wouldn't it have made sense to post it openly as them-selves, so we all knwo what they really think?
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  #10  
Old 02-13-2006, 01:10 PM
jmdriscoll jmdriscoll is offline
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yeah, your right......BUT, if you notice it shows your "NAT" address. if you actually pull the address of your machine up, it most likely is not the same address. The reason being is that big companies and ISP's use Network Address Translation...(NAT) for their clients connections going out on the web. The reason being is that they don't want the outside world to know any of the real IP addresses that they use in their internal networks, to keep people from making attempts to reverse engineer their network layout through ping sweeps and traceroutes. so they have what they public addressing and private addressing... the public address is the address that the world see's when you traverse the internet. the private address is the actual IP address of the client machine and is only known from within the organization....that is unless they have been hacked. anyway...yeah, it is a pretty usefull tool to keep the average joe user at bay with their "anonomous" postings...I already added it to my profile in another forum with statements like:


You are being watched...

You cookie folder is very discriminating...

I know that site you hit last night...


Toooooo funny...that aught to get a few people asking some questions.
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2000 Honda CR 250...this is where i get my rocks off!!!
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