Question about 2002 Volkswagen Jetta TDI
I have a 2002 Jetta 1.8T and right now I am having a problem with the low beam headlights. Once you turn the headlight switch on, the daytime running lights turn off, and the instrument cluster lights come on, but the low beam headlights do not come on. The daytime running lights run off the low beam filament in the bulb, and the bulbs are good they were just replaced. The fuses are also good. I even put a new headlight switch in thinking it was that, but it didn't fix it. When the headlight switch is turned on the green and yellow wire running in the back of the headlight switch harness has no power, but if the switch is in the on position it has power. Another problem I am having is the air conditioning clutch does not engage to run the pump. There is constantly 9v of power there whether the A/C button is on or off. Also, when you push the recirculate button the brake light comes on on the cluster, it beeps at me, and I lose power accelerating. I have the same problem on my 2002 VW Golf - no low beam headlights. The problem was noticed after I had to recieve a boost one cold winter day. I believe the boost allowed something to corrupt in my key, because the next time I tried to start my car, the electronic immobilizer was triggered. After that issue was fixed, I had no low beams! Same symptoms - I've even tried a new bulb. I am not sure where to go from here.
None of the above solutions are correct. Here is the correct solution:
The problem is in the high beam switch assembly which also houses your turn signals and possibly cruise control. There are some electrical contacts in the assembly which dis-connect the low beams when you put the high beams on. Constant use of the high beam switch will create arcing on the low beam switch which makes the contacts not conduct electricity anymore.
The repair is to either replace the assembly, $300 at dealer, $100 or less do it yourself, or take the assembly apart and clean it for free. (2 hours or less)
Instructions on taking your steering wheel off here: http://forums.tdiclub.com/showthread.php?t=151557
Instructions for fixing the switch here: http://forums.tdiclub.com/showthread.php?t=167831&page=4
P.S. If you own a VW, especially around model years 1999 to 2004, there is a rare but devastating problem with engine coolant being literally pumped through all electrical parts of your car.... destroying it. Repair cost = $8,000. It is called coolant migration. Check your VW right now (takes two seconds, literally), and do a two-minute procedure to fix your car to prevent the problem here: http://www.myturbodiesel.com/1000q/multi/coolant_migration.htm
Posted on Aug 20, 2010
But the daytime running lights do function? before you turn the headlight switch on they work fine? i'm asking because the drl and the low beams use the same ground. you don't say that the high beams work but i'm guessing they must or you would say. next thing to do is take the headlight assembly apart, remove a low beam headlight from the socket and see if, with headlight switch on, you have 12 volts between the low beam socket and ground. if you don't i would say that you have a faulty wire between the headlight switch and the low beam sockets. hope that helps
Posted on Jun 01, 2009
Go to a VW dealer (during the day) and see if they can hook it up to a machine to read ECU codes you may have a problem with your electronic control unit. just an idea and they shouldn't charge you to diagnose it but will to fix it. I don't know much about the car itself but from the sounds of it there could be a problem there since the filaments and fuses are good, if not then you have to be looking at a wiring problem, which doesnt make a lot of sense because the newer cars use a lot of harnesses and it is hard to mess those up. hope this helps a little and if not i hope someone else can.
Posted on Jun 01, 2009
AFTER you have disconnected the battery. Check ALL your fuses first. PULL THEM OUT, then check. Don,t just look at them. You have a short in the system and most likely it is in your lighting system. After checking all fuses and replacing any bad ones. Reconnect the battery and test. If that doesn't work you would be better off to have someone check wiring with a meter. This can be a hard trace.
Posted on Jun 01, 2009
Has anyone been able to solve this problem? I'm having the same issue, DRLs work, high beams work. However, once I turn the high beams off, the lows don't work. If I whack the underside of the steering column, then they'll come back on. Faulty wiring in the column lever maybe?
Posted on Dec 14, 2009
Same problem too, one of my rear brake lights turns on and off as I go around corners and some bumps too. Did anyone get this problem solved?
Posted on Mar 16, 2010
Did anyone help you with your problem? I'm having it too.
Posted on Mar 15, 2010
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Posted on Jan 02, 2017
you prob haven't used your lights all summer, I have seen this on more than one occassion, you are correct in your assumption, both you dim bulbs have blown. Both head and dim lights are in the same bulb, but head is working and dim is gone. If you take out one of the bubs you should be able to check it
Posted on Sep 08, 2009
There is no recall regarding the headlights on that vehicle.
What typically happens is the wiring inside the light housing melts and the bare wires randomly touch each other.
You can verify this by taking one of the plastic covers off the back of a headlamp housing and checking out the three wire harness inside. It is extremely common for this to occur on that vehicle.
The wiring can be repaired, though difficult without removing the lamp.
If you wish to replace the wiring with factory replacement parts, there is no service parts for the lamp, you must replace the entire housing unfortunately. For this reason most people just repair the melted wires.
Posted on Sep 17, 2009
Tips for a great answer:
Jan 04, 2016 | Cars & Trucks
HEADLIGHTS NOT WORKING
can be faulty headlight switch or issue with its wiring. Or its faulty head
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:-----
the link below: -----
• Car headlight bulbs don't last long?
How to Replace a Headlight
How to Replace a Headlight Bulb
How to Replace a Headlight Switch
How to Replace a Headlight Assembly
How to Replace a Park Light Assembly
Nov 28, 2012 | 1986 GMC K1500
Low beam HID light goes out? http://schematicsdiagram.blogspot.com/2012/01/low-beam-hid-light-goes-out.html
----------2007 Dodge Caliber: Low Beam Headlight Not working http://technoanswers.blogspot.in/2012/06/2007-dodge-caliber-low-beam-headlight.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: Both Low Beam Lamps Not Working? http://technoanswers.blogspot.in/2012/04/2001-chevrolet-tahoe-both-low-beam.html
--------------2002 Toyota Tacoma: Low Beams not working? http://technoanswers.blogspot.in/2012/04/2002-toyota-tacoma-low-beams-not.html
-----------Low beam headlights Modification? http://schematicsdiagram.blogspot.in/2012/04/low-beam-headlights-modification.html
-----------DRL and Low beams not working? http://schematicsdiagram.blogspot.in/2012/04/drl-and-low-beams-not-working.html
-----------These will help.Thanks.
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