C7 Owl Posted September 12, 2021 Share Posted September 12, 2021 My rear fog light disintegrated on a recent trip to Dorset. Due probably to petrol damage. I have bought a new unit from Just Add Lightness. Just fitted and connected into the same connector. I cant seem to get the light to illuminate. I have checked the connection is firmly in, checked the fuse is not damaged and it visually looks ok, have checked when on fully beam and on dipped. All other lights are working. Am I missing anything or is it a faulty unit from just add lightness? Didnt have my multimeter with me to check bulb but will do so when back at my garage. Any other things to check would be appreciated. Thanks Link to comment Share on other sites More sharing options...
SM25T Posted September 12, 2021 Share Posted September 12, 2021 LEDs are polarity sensitive. Link to comment Share on other sites More sharing options...
JAL Posted September 12, 2021 Share Posted September 12, 2021 PM sent Link to comment Share on other sites More sharing options...
Andy Lef Posted September 17, 2021 Share Posted September 17, 2021 Same issue here - did you get to a solution?Andy Link to comment Share on other sites More sharing options...
C7 Owl Posted October 14, 2021 Author Share Posted October 14, 2021 I very rarely drive caterham in dark so had not realised the switches to right of steering wheel control dip and full beam. Fog only works on dip. I broke plastic switch during a trackday, replaced switch put headlights into dip and voila the fog light illuminated. Ready fot MOT now. Fingers crossed! Link to comment Share on other sites More sharing options...
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