Aerial_stu Posted August 4, 2022 Share Posted August 4, 2022 Thankfully I passed my MOT two weeks ago, because now I have a problem.Any ideas where to start would be gratefully received.When I turn my headlights / sidelights on, my left indicators also come on (solid, not flashing) - which I was alerted to because of the horn repeater.Also noticed, when I turn my left indicator on (when no headlights are on) all the dash lights go on and off as the indicator flashes. Flipping heck, where do I start?Thanks Link to comment Share on other sites More sharing options...
Wrightpayne Posted August 4, 2022 Share Posted August 4, 2022 My money on an earth issue - check the headlight bowl earth points and chassis earths (battery to engine, engine to chassis, o/s front brake union and wiper motor) Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 4, 2022 Member Share Posted August 4, 2022 Wow!What's a horn repeater?Has there been any work on it since it was all OK?Have you got a multimeter and would you like a wiring diagram?Checking earths is a good idea, and I'd add the instrument earthing point to that list. Work the hazard warning light switch on and off a few times... has that made any difference?Remove all of the side and tail bulbs. Switch the sidelights on... does the left indicator still come on?Remove all of the indicator bulbs. Turn the left indicators on... do the instrument lights still come on?Jonathan Link to comment Share on other sites More sharing options...
Aerial_stu Posted August 4, 2022 Author Share Posted August 4, 2022 Thanks for initial comments, I'll have a go at these at the weekend.a horn repeater? Its the buzzer/ horn that makes a noise when the indicator flashes.Stuart Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 4, 2022 Member Share Posted August 4, 2022 Thanks: was that there well before these problems?Jonathan Link to comment Share on other sites More sharing options...
Aerial_stu Posted August 4, 2022 Author Share Posted August 4, 2022 Yes, it's just the normal buzzer when the indicators are on. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 4, 2022 Member Share Posted August 4, 2022 ThanksJonathan Link to comment Share on other sites More sharing options...
timb2117 Posted August 5, 2022 Share Posted August 5, 2022 Also check battery connections are clean, bit of grease and tight, I spent months chasing round to find it was a simple earth lead on the battery.Would they have disconnected anything at the MOT and re connected it badly - potentially causing the fault?Otherwise stick with the guys comments above -probably spot on, spend a lot of time looking and wiggling (the terminals :)) prior to removal and checking you may well see looseness. Link to comment Share on other sites More sharing options...
ACFowles Posted August 5, 2022 Share Posted August 5, 2022 I would check the wiring and earthing of the tail lights.I've seen situations where a bad earth causes the tail light to track back to earth via the indicator lamp. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 5, 2022 Member Share Posted August 5, 2022 Yes. That's the family of faults where pulling bulbs can be a useful part of the diagnostic approach.Jonathan Link to comment Share on other sites More sharing options...
TJG Posted August 5, 2022 Share Posted August 5, 2022 Might be worth a look at wiring loom in rear arches etc for chafing against tyre causing bridged wiring. Link to comment Share on other sites More sharing options...
Aerial_stu Posted August 5, 2022 Author Share Posted August 5, 2022 Thanks, I've cleaned the earth in the bowl and all seems to be good for now. love this forum! Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted August 5, 2022 Leadership Team Share Posted August 5, 2022 Stuart, do a search on eBay for "dielectric grease", it's well worth applying a little to connectors, earth points etc when you're re-making connections. It slows down the build up if the green plague on the copper connectors and prevents dry joints.Stu. Link to comment Share on other sites More sharing options...
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