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Earthing issues


Jason

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Posted

I have aquired some dodgy indicators over the winter, they flash twice rapidly and thats it. I was wondering if there was a sensible order in which to fault find? Bearing in mind that i am crap with car electrics!

Posted

Which, front, back, sides, dash?  :-/

It's a very complicated circuit (for something that is normally simple).  ::)

Check to see if the front and back are still working when the side/dash ones have stopped.

Quite often this is a problem with the B post tell tales as the dash ones work with them, how do I know  :B

Posted

Well I think I have traced the fault to the flasher unit connections, gave them a clear and a tweak and it all seems to work - however, the flasher unit does got very hot. Now I know it's supposed to get warm as it works with heat but this was too hot to touch - is that normal?

Posted

Is it still the original old lucas flasher unit?........ if so, bin it.

Buy a modern "solid state" flasher unit from any decent auto factors, and you get rock steady flashers at a sensible rate.

Only mod you have to do is to add an earth to it, as it will have 3 pins rather than the 2 you have now.

Posted

Jason wrote:
It's got a three pin unit in it now and if I drop a modern flasher unit in, all I get is the C post flashers!


Thats because the old 3 pin has 1 common and 2 outputs, i.e. it flashes main indicators, gets too hot, bimetalic strip flips over and then flashes the pillar repeaters, cools off, then snaps back, flashes main repeaters etc etc. ( its almost a change over switch)  if you want to use modern flasher units, joint the 2 non common wires together i.e. not the positive feed, then main flashers and repeaters flash together not out of phase with each other

modern flasher units have positive, earth and output.

mike

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