Colin Lindsay Posted November 17, 2020 Report Share Posted November 17, 2020 I bought two red LED Stop and Tail Light bulbs online last night and the confirmation e-mail states they're positive earth; my mistake! I've messaged the seller in the hope he'll swap them for negative but if not, how polarity sensitive are they if I fit them to a negative earth Triumph? Will they just be dimmer / no difference / or blow the electronics completely? Link to comment Share on other sites More sharing options...
RogerH Posted November 17, 2020 Report Share Posted November 17, 2020 Generally if you reverse the polarity they will suck light in rather like a black hole not work They are conventional diodes that produce light - wow. A normal diode blocks one way and allows current to flow the other way. TRy and get them swapped. Roger Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 17, 2020 Report Share Posted November 17, 2020 colin youve not been the same since you made a flood ha !! Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted November 17, 2020 Author Report Share Posted November 17, 2020 That really was a senior moment, Pete. I spent so long making sure all of the other fittings / voltages and things were correct I missed the two big words at the start that said "POSITIVE EARTH". The seller did say they'll fit all Triumphs MGs and other British cars of the period... but obviously only the positive earth ones. Link to comment Share on other sites More sharing options...
rlubikey Posted November 17, 2020 Report Share Posted November 17, 2020 If you're handy with a soldering iron, do as I did and break the glue joint, swap the leads over and hey presto! Cheers, Richard Link to comment Share on other sites More sharing options...
Colin Lindsay Posted November 17, 2020 Author Report Share Posted November 17, 2020 7 minutes ago, rlubikey said: If you're handy with a soldering iron, do as I did and break the glue joint, swap the leads over and hey presto! Cheers, Richard If the seller doesn't swap, and I've no reason to suspect he won't if I pay the postage, then I may have to look at that. Not the first thing I've repaired to destruction. Link to comment Share on other sites More sharing options...
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