MJH2454 Posted August 24, 2021 Report Share Posted August 24, 2021 Hi, I seem to have a bad earth in the light / indicator circuit, lights and indicators all work fine when operated separately but if I use the indicators with the lights on all 4 indicator lamps flash, the side that is flashing when it shouldn't does have a weaker light output. I have checked / replaced all the earthing connections from the indicator / side light units, replaced the indicator /side light units for new ones, replaced the immediate earthing connector in the loom. Where willI I find the main earthing point for the indicator /side lights? I have not done any investigation with the wiring on the rear units. I do not have a hazard flasher unit so the fault is not from there Thanks Link to comment Share on other sites More sharing options...
NonMember Posted August 24, 2021 Report Share Posted August 24, 2021 7 minutes ago, MJH2454 said: Where willI I find the main earthing point for the indicator /side lights? What car? On quite a few of them the front side and indicator unit is only earthed by its fixing bolts, to the bodywork. Similarly with the rear light clusters on late Spitfires. I'm slightly surprised by your symptoms - the normal bad earth behaviour is a bit different. Link to comment Share on other sites More sharing options...
MJH2454 Posted August 24, 2021 Author Report Share Posted August 24, 2021 Just now, NonMember said: What car? On quite a few of them the front side and indicator unit is only earthed by its fixing bolts, to the bodywork. Similarly with the rear light clusters on late Spitfires. I'm slightly surprised by your symptoms - the normal bad earth behaviour is a bit different. Sorry, MKIV Spitfire, currently fitted with Fibreglass front quarter panels hence the wired earth, what are your thoughts with my symptoms? Link to comment Share on other sites More sharing options...
NonMember Posted August 24, 2021 Report Share Posted August 24, 2021 2 minutes ago, MJH2454 said: what are your thoughts with my symptoms? Well.... If the indicators work normally in isolation then the bulbs are earthed. If they were earthing through the side lights then the affected indicators would be dim, the rear one would either not flash or flash erratically, and the side lights would all come on or flash. One way to get symptoms like yours - especially as you have GRP valances and therefore the fixing bolts are not earthed to the body - is if you've swapped the indicator wire with the earth wire. I'm not sure it would be exactly what you have, though. Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 24, 2021 Report Share Posted August 24, 2021 dont forget the awfull mix and match rear lamp claw holders with and without earths and the mix up of twin and single filament bulbs and coresponding matched or not holders Pete Link to comment Share on other sites More sharing options...
RogerH Posted August 24, 2021 Report Share Posted August 24, 2021 TRacking down a bad Earth - it's between Venus and Mars and possibly getting worse. Roger 1 Link to comment Share on other sites More sharing options...
Badwolf Posted August 24, 2021 Report Share Posted August 24, 2021 30 minutes ago, RogerH said: TRacking down a bad Earth - it's between Venus and Mars and possibly getting worse. Roger An utterly insignificant small blue/green planet in the western spiral arm of the galaxy. Mostly harmless Link to comment Share on other sites More sharing options...
Badwolf Posted August 24, 2021 Report Share Posted August 24, 2021 I think that we went down this route last month!! What do you get when you multiply 6 by 9? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now