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Re: LOW BEAM LIGHTS
Hi Rich Million,
Check the bulbs for the low beam problem and if they're ok, check the fuses under the bonnet (hood) which are found in the fuse box. If you've already checked those, go to the fuse box inside the vehicle.
Still no luck....remember that there are fuses and relays inside the cabin behind the kick panel.....You may find that there is a problem with the main fuse box.....If you drive over rough terrain, check the connections under the main fuse box....even if your roads are all smooth, it's still worth checking.....
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It is normal that when you select high beam that the two high beam lights come on and the low beams switch off. the light position should show high beam
It goes off on low beam when the high beam lights go off and the low beams light up
If the light is reversed then check the wiring to the light
You didn't mention what car it is but if it has a light module then the problem may be in it.
You may need a shop manual to fix this. The headlight switch circuit involves high beam and low beam relays, and a fuse for each circuit, and the body computer controls it all. You would need to know if the low beam fuses have power and the low beam relay is working.
The high and low beam lights use the same power source, so if the low beams work the high beams have power. There is a low and high beam relay controlled by the dimmer switch. If the low beams work and the high beams don't, and the bulbs are good, check the dimmer switch and the high beam relay.
If high beams work and low beams do not, then it is probably the high/low relay. It is part number 15016745 and has four prongs. To test if your relay
has gone bad locate the relay in your fuse box. There will be two of these
relays located next to each other. One controls the low beam headlights
and the other the cooling fan. Swap the relays and check your low beam
headlights. If the low beams work you have a bad relay.
Sounds like its a problem with the light switch handle. Had it myself as well...
If you're savvy enough around car electronics take out the light switch handle, take it apart, find the problem and fix it. Inside the handle-switch you have several slide-switches and some double action slide switches.
Otherwise - get a different switch from a local junkyard or get a new one from your dealer.
The problem is in the high beam switch assembly which also houses your
turn signals and possibly cruise control, and yes, I'm sure. 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 daytime running lights send power to the low beams on a separate circuit. .
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:
check your relays, they are like big fuses in your engine compartment, if your low beam and high beam relays are the same model, switch them and see if this enables low beams and disables the high beams. if it not the relays, or fuses, then it is probably your wiring harness, an expensive repair.