Amjad Posted October 18, 2013 Share Posted October 18, 2013 So I ordered some dual filament T20 wedge base LEDs for the GT, and tried to fit them just now. They're not behaving normally: - If I partially insert a bulb then it lights up but when I go to press the brakes they do not get brighter.- Then when I fully clip the bulb in, it doesn't light up at all. If I then switch the bulb round 180 degrees as you often need to with LEDs, then it turns all the brake lights on bright (including spoiler brake light). If I use a single filament (brake) bulb on the bottom, it functions as normal but the dual ones are giving me problems! I fitted some LED indicators yesterday with resistors all round and they work perfectly, so I'm not sure whether this would have any impact on the brake lights? When I fitted LED brake bulbs to the NA I didn't get any funny business and no resistors were required. With regards to the wiring loom, I've noted that each pair of brake bulbs share a power for both SIDELIGHT and BRAKELIGHT. Again, not sure if this makes any difference! Would like to get this sorted out! Amjad Quote Link to post Share on other sites
Amjad Posted October 20, 2013 Author Share Posted October 20, 2013 Any ideas guys? Quote Link to post Share on other sites
JayJ Posted October 20, 2013 Share Posted October 20, 2013 Sounds like a bad connection/short circuit, if moving the bulb changes the behavior Quote Link to post Share on other sites
Amjad Posted October 20, 2013 Author Share Posted October 20, 2013 That's what I was thinking, I fiddled with the pins a bit only to get the same result. I was thinking this however, may be the problem: I believe the socket's may have the arrangement as shown on the right side of the diagram. I guess the only way to be sure is to try the bulbs in another GT to make sure it's the bulbs at fault and not my car! Quote Link to post Share on other sites
JayJ Posted October 20, 2013 Share Posted October 20, 2013 Different pinout makes sense too. Check your socket with multimeter, so you know which pin has 12v with parking lights on and which pin has 12v when brake pedal is pressed. Quote Link to post Share on other sites
Amjad Posted October 20, 2013 Author Share Posted October 20, 2013 I should really buy myself a multimeter already! Haha! Will update this thread hopefully when I've sorted it, but if anyone has any ideas please do chime in! Quote Link to post Share on other sites
Amjad Posted October 22, 2013 Author Share Posted October 22, 2013 Having done some research, I believe the bulbs were at fault! Ordered some new bulbs, will update when I've tested them Quote Link to post Share on other sites
Jamie1st Posted October 22, 2013 Share Posted October 22, 2013 Also LED's work one way, remember that. Not like a conventional bulb that will work what ever the polarity is (Postive and Negative can be either way). So get a multimeter and check that the live is where it should be and earth where it should Quote Link to post Share on other sites
Amjad Posted October 22, 2013 Author Share Posted October 22, 2013 Yeah Jamie! The ones I've bought recently are weird, they work regardless of the polarity haha! I'm hoping these new ones work, theyre the super bright CREE ones like you get on new premium cars ;) Quote Link to post Share on other sites
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