RichardAllen Posted March 8, 2011 Share Posted March 8, 2011 I have a 300TDi 90 which has developed a very odd indicator/hazards problem. With hazards on: the following work: - Right front indicator - Right side repeater - Right rear indicator - Left Rear inidcator the following do not work: - Left front indicator - Left side repeater With indicator stalk switched to indicate a right turn, Right hand indicator, right side repeater and right rear indicator all work, facscia indicator light flashes normally With indicator stalk switched to indicate a left turn, left hand indicator, left side repeater work. The left rear indicator does not work, and the facscia indicator light flashes at double speed So one way or another I can get all four indicators and both side repeaters to light up - no bulb or obvious earth problems, and the right hand side works normally. The left side however is wierd. Left front indicator and side repeater work on indicator, but not on hazards. The left rear works on hazards but not on indicator. These symptoms are clear and repeatable, so not obviously an intermittent loose connection. I do have a trailer pickup which I have not been able to test. I am not clear exactly what the indicator warning light flashing at double speed is telling me. I was messing around with the fascia and passenger compartment fuse box at the weekend so may well have disturbed something. I have looked on the forum, the indicators/hazard technical archive and the diagrams in Rave with no obvious clue as to where the problem might be. What really puzzles me is that the circuit diagram shows that all the lights on one side are powered by a common feed from the header joint K109, so I cannot see how the front lights on the left hand side can work on indicators without the rear on that side working, and likewise how the rear on the left hand side can work on hazards without the fronts on that side working. Apologies for this being somewhat long winded, but all help gratefully received. Regards Richard Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted March 8, 2011 Share Posted March 8, 2011 This is very likely to be an earthing issue, it usually is when one circuit interacts with another. An earth issue would also explain why the front works when the back doesnt, for example. Quote Link to comment Share on other sites More sharing options...
western Posted March 8, 2011 Share Posted March 8, 2011 I am not clear exactly what the indicator warning light flashing at double speed is telling me means dead bulb/light not working correctly. Quote Link to comment Share on other sites More sharing options...
lapperz Posted March 8, 2011 Share Posted March 8, 2011 means dead bulb/light not working correctly. hi can someone tell me where to find the earths for the indicators Quote Link to comment Share on other sites More sharing options...
wib Posted March 8, 2011 Share Posted March 8, 2011 hi can someone tell me where to find the earths for the indicators all the earths are bolted to the inner wing on both sides if u take off your wheel spat and look up at the front of the wing u will see them Quote Link to comment Share on other sites More sharing options...
RichardAllen Posted March 8, 2011 Author Share Posted March 8, 2011 On mine, the earth for the fronts is in the engine compartment on the bulkhead near the clutch master cylinder, and the rear earths feed back through the chassis onto an earthing point on the gearbox Quote Link to comment Share on other sites More sharing options...
RichardAllen Posted March 8, 2011 Author Share Posted March 8, 2011 Err brake lights and reversing light don't work either, fuse OK. Looks like the earth at the rear somewhere needs some delicate adjustment Quote Link to comment Share on other sites More sharing options...
Vulch Posted March 9, 2011 Share Posted March 9, 2011 I have an 83 110 body on a 93 chassis - the electrics are always playing up! I find that a long wire running from the battery negative terminal is really useful for sorting out earthing problems. Just attach it to what is supposed to be the earthing terminal on the light in question (I use a crocodile clip - I nicked my multimeter from school when I was a nipper!) It also provides you with a bulletproof earth to measure p.d. against. HTH Vulch Quote Link to comment Share on other sites More sharing options...
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