Taxes2Noise Posted November 2, 2006 Share Posted November 2, 2006 Hello all. Im sorry to generate yet another fog light thread however I have searched the forums and it seems Ive coined a completely new way to screw up the TRL install! I have completed the wiring as per the diagram (to the best of my very limited ability) save for the 12V lead and the pair of lights that I have converted to Brake/fog lights no longer light up when the rear lights are switched on. But the brighter filaments do work when I apply the brakes. I hope that makes sense. I have tried changing the bulbs to no avail. I would really appreciate any ideas anyone might have as to the cause of this. I should add that I am still in the process of running the 12V cable from the fog light switch to the relays, but as I understood it the normal brake light circuit should still work... I think Thank you in advance for any help. Quote Link to comment Share on other sites More sharing options...
SteveR Posted November 2, 2006 Share Posted November 2, 2006 You've lost me - do the brake lights work or not at the moment? Quote Link to comment Share on other sites More sharing options...
SteveR Posted November 2, 2006 Share Posted November 2, 2006 This is the best guide on how to do your fogs BTW, it uses the wiring you're trying to do but explains it in great detail. http://www.mkivsupra.net/vbb/showthread.php?t=80479 Quote Link to comment Share on other sites More sharing options...
Pixelfill Posted November 2, 2006 Share Posted November 2, 2006 have you definitely used the correct 12V relays ? Mike Quote Link to comment Share on other sites More sharing options...
Taxes2Noise Posted November 2, 2006 Author Share Posted November 2, 2006 Thank you steve. Youve cleared it up for me, Im such an idiot! I had wired the relays correctly, but cut and connected the lights the wrong way round! So Id wired the "no connections" side of the diagram to the offside lights (without the boot lock in it) & vice versa with the wire bundle containing the ground. The diagram in the link you provided was much clearer thank you. Ill set about swapping everything around and hopefully that'll sort it out. Cheers. Quote Link to comment Share on other sites More sharing options...
Taxes2Noise Posted November 2, 2006 Author Share Posted November 2, 2006 Just incase anyone else ever has this problem (unlikely Im sure): To clarify the symptons of connecting the TRL conversion the wrong way around: 1. The converted fog/brakelights work when the brake pedal is depressed (their brightest bulb fillament lights up). 2. When not braking, with the cars lights switched on, the converted lights are unlit (the duller bulb fillament - backlight - is inoperative). I hope that clears it up. Thank you to everyone for their help. Quote Link to comment Share on other sites More sharing options...
SteveR Posted November 2, 2006 Share Posted November 2, 2006 Thank you steve. Youve cleared it up for me, Im such an idiot! I had wired the relays correctly, but cut and connected the lights the wrong way round! So Id wired the "no connections" side of the diagram to the offside lights (without the boot lock in it) & vice versa with the wire bundle containing the ground. The diagram in the link you provided was much clearer thank you. Ill set about swapping everything around and hopefully that'll sort it out. Cheers. No worries dude, I didn't write it (credit goes to Mike (Pixelfill) there) but I'm glad I could point you in the right direction. I had a few stupid moments when I did mine (just before the guide Mike did!), like connecting various wires to each other whilst trying to work out which wire was connected to which light. I got it sussed and then for some unknown reason decided to short one connection to ground just 'to check' I'd sussed which wire was doing what (result: blown fuse). Not my finest moment! Quote Link to comment Share on other sites More sharing options...
Pixelfill Posted November 2, 2006 Share Posted November 2, 2006 Thank you steve. Youve cleared it up for me, Im such an idiot! I had wired the relays correctly, but cut and connected the lights the wrong way round! So Id wired the "no connections" side of the diagram to the offside lights (without the boot lock in it) & vice versa with the wire bundle containing the ground. The diagram in the link you provided was much clearer thank you. Ill set about swapping everything around and hopefully that'll sort it out. Cheers. AFAIK it doesn't matter which way round you wire the lights, as long as one side isn't connected, and the other is it should be fine. When I made that diagram I just happened to have those pictures of the lights like that. check what you currently have with a multi-meter before redoing the wiring. Mike Quote Link to comment Share on other sites More sharing options...
Pixelfill Posted November 2, 2006 Share Posted November 2, 2006 Just incase anyone else ever has this problem (unlikely Im sure): To clarify the symptons of connecting the TRL conversion the wrong way around: 1. The converted fog/brakelights work when the brake pedal is depressed (their brightest bulb fillament lights up). 2. When not braking, with the cars lights switched on, the converted lights are unlit (the duller bulb fillament - backlight - is inoperative). I hope that clears it up. Thank you to everyone for their help. That sounds very similar to the fault I had when I used the wrong relays (24v rather than 12v) Mike Quote Link to comment Share on other sites More sharing options...
Scooby Posted November 3, 2006 Share Posted November 3, 2006 Where did you get the relays from? I was looking at fitting this to mine but the cheapest I could find 12v relays for was £9.99 each!!! Quote Link to comment Share on other sites More sharing options...
Pixelfill Posted November 4, 2006 Share Posted November 4, 2006 Where did you get the relays from? I was looking at fitting this to mine but the cheapest I could find 12v relays for was £9.99 each!!! Maplin I can't remember exactly how much but were much cheaper than 9.99 each. edit: N00AW 1.99 +vat each Mike Quote Link to comment Share on other sites More sharing options...
Lez Posted November 4, 2006 Share Posted November 4, 2006 Maybe a bit late but this is another way to do the fog mod. [ATTACH]46485[/ATTACH] Quote Link to comment Share on other sites More sharing options...
SteveR Posted November 4, 2006 Share Posted November 4, 2006 I got mine from a motor factors near me, they deliver though so if Maplin don't and you can't get any let me know and I'll dig out the details. Quote Link to comment Share on other sites More sharing options...
Taxes2Noise Posted November 4, 2006 Author Share Posted November 4, 2006 Mike, I got my relays from maplin using the product code number from the idiots guide on one of the (many) threads. Im way from my car this weekend so Ill double check that they are the correct ones when I get back home. Im pretty sure they're 12V.... Quote Link to comment Share on other sites More sharing options...
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