f40 cab Posted January 19, 2012 Share Posted January 19, 2012 hi everyone i have a problem on my mk4 cab when i turn the side lights on the main bulbs light up dim as well, the when turn on main they go brighter like normal and full beam the same brighter still its just the fact the main lights light with the side lights ive now re ndone all h4 conections sidelight connections and stripped the loom back to the earthpoints and all look fine any ideas as im now running out of the and mot due next few days thank you for any help Quote Link to comment Share on other sites More sharing options...
Admin Paul Posted January 20, 2012 Admin Share Posted January 20, 2012 Stalk?? Earth points?? Relay?? Are the rear lights working as normal ? Quote Link to comment Share on other sites More sharing options...
gingergman Posted January 20, 2012 Share Posted January 20, 2012 Could well be the stalk, they do like to play up Quote Link to comment Share on other sites More sharing options...
f40 cab Posted January 22, 2012 Author Share Posted January 22, 2012 UPDATE: does anyone now what the small blue relay under drivers side dash does. i dont think its the stalk as it works to control the other light settings as normal. rear lights are working as normal. when the side lights are on, if i remove a mains bulb or fuse both headlights go out and sides light as normal, so its getting a power feed from some where what relays control the light circuits any help will be great ive traced the wiring loom all the way to the fuse box all clean contacts and no breaks so must lay further back any ideas. Quote Link to comment Share on other sites More sharing options...
Guest shaun Posted January 27, 2012 Share Posted January 27, 2012 sure the main headlights light up dim with side light bulb, then on dipped they light up properly ( brighter) then on full beam (brighter again ) Quote Link to comment Share on other sites More sharing options...
f40 cab Posted January 28, 2012 Author Share Posted January 28, 2012 thanks for that shaun, can anyone verify this please its a mk 4, Quote Link to comment Share on other sites More sharing options...
iansoutham Posted February 15, 2012 Share Posted February 15, 2012 What is happening with your light is correct for the vehicle. In 1986, EU legislation determined that, when the engine is running, vehicles should not be driven with only side lights on. For this purpose, the headlights will come on dim (they basically wire in series through each other). When the lights are put on "dip" mode, they work as normal. IF the ignition is off, the sidelights only will illuminate. IF you want to remove this feature, at the back right hand corner of the fusebox in the engine bay is a set of 3 small 10A relays. Remove the small blue one (if I remember correctly) and the lights should work as normal. Quote Link to comment Share on other sites More sharing options...
f40 cab Posted February 21, 2012 Author Share Posted February 21, 2012 thank you for help i wish i would of known this weeks ago lol would have saved alot of time and rewiring . thank you again for help. Quote Link to comment Share on other sites More sharing options...
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