Roger Cumming Posted January 26, 2016 Share Posted January 26, 2016 Both head lights work on side and dip, off side goes out on main beam but works on flash??? BonkersAny thoughts any one....Need to sort tonight!!Roger Link to comment Share on other sites More sharing options...
Simon.Rogers Posted January 26, 2016 Share Posted January 26, 2016 Earth ! Link to comment Share on other sites More sharing options...
Mark Durrant Posted January 26, 2016 Share Posted January 26, 2016 RogerThere is usually an earth inside each headlight bowl so I would start with this on the light where the main beam is not working.Mark Link to comment Share on other sites More sharing options...
revilla Posted January 26, 2016 Share Posted January 26, 2016 With main beam switched on, use a multimeter to measure the voltage at each of the three terminals on the bulb holder (in each case connect the positive probe on the meter to the terminal in question and the negative probe to the battery negative or a known good earth such as the engine block). This will quickly identify whether it is a supply or earth problem. 12V missing where expected means supply wiring problem. 12V found on the ground side of the bulb where not expected means earth fault. Link to comment Share on other sites More sharing options...
SM25T Posted January 27, 2016 Share Posted January 27, 2016 As per your other thread .... change the bulb. Link to comment Share on other sites More sharing options...
Roger Cumming Posted January 28, 2016 Author Share Posted January 28, 2016 Solved it!!! The main beam wire into the connector at the front of the chassis is a little dodgy probably from vibration because it hangs off the frame. It is shoved in firm at the moment ready for MOT tomorrow and will be sorted properly at the w.e. Both head lights really clean and tidy now after all the fettling during my 6.30 this morning in the garage. Eldest son found the fault!!Drove to the garage in torrential rain, aero mod!! only for the guys not to be there thinking I wouldn't turn up in such bad weather!! Tomorrow 8.15 is the new time and it should be sunny. The joys of a Caterham.....Thanks everyone for all support in the hour of need.Roger Link to comment Share on other sites More sharing options...
revilla Posted January 28, 2016 Share Posted January 28, 2016 Glad it is sorted. :) Link to comment Share on other sites More sharing options...
Roger Cumming Posted January 30, 2016 Author Share Posted January 30, 2016 Passed, now full steam ahead!!Roger Link to comment Share on other sites More sharing options...
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