carl0s Posted October 9, 2005 Share Posted October 9, 2005 Please help! I have a UK car with inbuilt fog-light circuitry, but I have replaced my rear lights with facelift jap-spec units, and therefore now have twin brake lights and no rear fog lights. I have an MOT test tomorrow morning and am going to fail on this. I am thinking that if I can find out which wire powers the fogs, then I can strap that wire to the right-hand inner brake light with a resistor, therefore getting a permanently brightened RH fog light. Can anybody tell me which wire I need to look at? Also, to help with my testing, should the fog lights come on without the main lights? e.g. can I test with my multimeter with just the fogs turned on but the lights themselves off? cheers, Carl Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Anyone? It's been nearly an hour! Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Okay I've found the wiring diagrams on mkiv.com, but they don't mean much to me - I need to know about wire colours and what not Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Reckon I might be onto something here.. there's a wire going into the connector *from* my car, but the corresponding pin on the J-spec lights doesn't exist. Fingers crossed.. Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 YEAH BABY. Now can anybody help me with what kind of resistor I need? Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 I could just strap it across, but then I might blow the bulb as it'd be getting lots of current, and even more when I hit the brakes! Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 I was wondering when I'd get to try these out.. http://www2.css-networks.com/terminal.jpg ho hum.. chatting to myself. No finer person to talk to.. Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Awesome. A dude I know suggested moving the pin for the RH reverse light over to the Fog pin - Job done! Just need to find some red nailvarnish for the bubl now Link to comment Share on other sites More sharing options...
SteveR Posted October 9, 2005 Share Posted October 9, 2005 Is this thread any help - it has photos in it and links to the wiring diagrams (for J-Specs tho) IIRC Link to comment Share on other sites More sharing options...
Simon Posted October 9, 2005 Share Posted October 9, 2005 Well done Carlos, you asked and answered you're own questions. a PROMOTION must be due for that. Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Is this thread any help - it has photos in it and links to the wiring diagrams (for J-Specs tho) IIRC I did like the sound of that - I saw it on Thor's website, but I was/am not sure how it would apply to a UK car where the wiring is already in place. As things are now, I have lost a reversing light. Really I could do with a red lense but painting the bulb should get me through the MOT tomorrow Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Well done Carlos, you asked and answered you're own questions. a PROMOTION must be due for that. Now what could you promote a chairman to.... Link to comment Share on other sites More sharing options...
Paul Posted October 9, 2005 Share Posted October 9, 2005 http://www.mkivsupra.net/vbb/showthread.php?t=19436&highlight=fog+light+mod Try this, did it on mine and passed two MOT's no problem. Diodes suggested worked great! Paul Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 http://www.mkivsupra.net/vbb/showthread.php?t=19436&highlight=fog+light+mod Try this, did it on mine and passed two MOT's no problem. Diodes suggested worked great! Paul Awwwwwwwsome. hmmm. I think I will paint the bulb today, and buy a new bulb and some diodes tomorrow. MOT in the morning. I knew I wasn't alone with trying to pass MOTs.. Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 http://www.mkivsupra.net/vbb/showthread.php?t=19436&highlight=fog+light+mod Try this, did it on mine and passed two MOT's no problem. Diodes suggested worked great! Paul Paul, does this stop the inner lights (fogs) going even brighter when you brake? Link to comment Share on other sites More sharing options...
Paul Posted October 9, 2005 Share Posted October 9, 2005 Paul, does this stop the inner lights (fogs) going even brighter when you brake? No mate, all it does is switch on one pair of brake lights permenantly and has no adverse effect on the remaining brake lights. Switch your fog off and it reverts back to four brake lights Paul Link to comment Share on other sites More sharing options...
Paul Posted October 9, 2005 Share Posted October 9, 2005 Just got what you meant, NO, the resistors don't dim down the brake lights used for fogs. Paul Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Just got what you meant, NO, the resistors don't dim down the brake lights used for fogs. Paul sort of, what i mean is that those lights which are on as fogs, would they go even brighter if you braked whilst they were on as fogs? Or do the diodes block the brake power going to them when they're on as fogs? Not sure why I'm bothered, it obviously works. I was just afraid of blowing the bulbs with them getting double super-brightness (fog power + brake-light power = lots of power & brightness). Link to comment Share on other sites More sharing options...
Paul Posted October 9, 2005 Share Posted October 9, 2005 No, they are on at the same brightness as the brake lights and won't alter when the brake lights come on, no brighter or dimmer. It's a pukka mod, cheap too (we like cheap) I've had mine in since that thread and no problems. Paul Link to comment Share on other sites More sharing options...
carl0s Posted October 9, 2005 Author Share Posted October 9, 2005 Great stuff, thanks. I'vejust failed miserably with some acrylic red paint - it started smoking when the bulb was on. Just found a can of Tamiya paint and trying that now Link to comment Share on other sites More sharing options...
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