I reply to every thread Posted July 24, 2014 Share Posted July 24, 2014 Posted in the (likely vain) hope that someone else has had the exact same issue thus releasing me fro a few hours with a test light/multimeter. S3 HPC. Headlights work fine. Rear lights don't illuminate, nor do brake lights - BUT, pressing the brake pedal lights up the dash lights and side lights. No numb nut " bad earth" suggestions please - I'm looking for something more specific Link to comment Share on other sites More sharing options...
Guest Posted July 24, 2014 Share Posted July 24, 2014 Has this just "happened" or have you previously changed something or washed the car? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted July 24, 2014 Member Share Posted July 24, 2014 Is it similar to this problem (and explanation)? Jonathan Edited by - Jonathan Kay on 24 Jul 2014 13:05:13 Link to comment Share on other sites More sharing options...
Paul Deslandes Posted July 24, 2014 Share Posted July 24, 2014 1. do indicators work or light up at all, front and/or rear? with or without sides on? 2. dash and sides, is that front sides only and is that with the sidelight switch on in both side-only and with-headlights positions? 3. when the dash and sides light up when you press the brake pedal, are they dim or full brightness? It does sound like an earth off (but you want to know which one). Try taking a wire from the rear light block to a good chassis point somewhere. Paul Link to comment Share on other sites More sharing options...
nickh7 Posted July 24, 2014 Share Posted July 24, 2014 I had the same issue without the dash lights coming on , it was the connector blocks from the rear loom to the lights . They had furred up and the dry weather triggered it. I had to take them all apart and clean the connectors one by one to cure it Link to comment Share on other sites More sharing options...
I reply to every thread Posted July 24, 2014 Author Share Posted July 24, 2014 Thanks all - some pointers there for this evening Link to comment Share on other sites More sharing options...
I reply to every thread Posted July 29, 2014 Author Share Posted July 29, 2014 For the record......... This symptom was caused by both tail/brake lights having blown. Replaced them and all is fine. Easiest fix ever Link to comment Share on other sites More sharing options...
Ian B Posted July 29, 2014 Share Posted July 29, 2014 Yea, but it was probably caused by a bad earth Link to comment Share on other sites More sharing options...
Roger Ford Posted July 29, 2014 Share Posted July 29, 2014 Trying to figure out the mechanism for this. The only possible one is that the blown filament has shorted the supply between the brake and tail filements (in one or both bulbs). However, this would require not only a short, but that all four filaments are blown. Unless, of course, there was a bad earth as well ... Link to comment Share on other sites More sharing options...
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