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Flasher Unit Earthed?


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#1 smj

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Posted 28 April 2010 - 09:13 AM

Even with the aid of haynes I am having serious troubles with indicators and hazards!!! should both flasher units be earthed physically to the car or is dangling on their connecting wires okay? by moving the indicator stalk the indicators do flash, but very randomly and not at the correct speed, also the indicator flasher unit gets warm/hot. I have fed a permanent live feed to the hazard swith from the fusebox as the original wire had long since vanished, the light green/pink wire is present and goes back to the switch? this is becoming a nightmare!!!!!

#2 Wil_h

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Posted 28 April 2010 - 09:21 AM

Dangling is fine.

It will get hot it's a bi-metallic strip flasher. I binned the indicator flasher, and fitted a modern electronic unit (£10 Halfords). These do need earthing, but it's a much better and more consistent flash.

#3 WiredbyWilson

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Posted 28 April 2010 - 10:11 AM

Can you explain which unti you have removed and what you replcaed it with wiring wise please Wil - as my indicators are a bit poop!

#4 Wil_h

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Posted 28 April 2010 - 10:40 AM

iirc. the standard flasher has two connections:

2 green wires to switch
1 green(?) wire from fuse

What you need is a 3 pin electronic flasher unit from Halfords like this one flasher unit then connect as follows:

+ve single green (?) wire
-ve earth (new wire needs running)
Two green wire connector to spare contact (not sure what it is called on flasher unit)

#5 WiredbyWilson

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Posted 28 April 2010 - 10:45 AM

ah i think i know what you are saying.

the link is to a 4 pin relay though :)

#6 smj

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Posted 28 April 2010 - 07:42 PM

just picked up two new units from halfords, one for the indicators, one for the hazards, the indicator 1 is 6x21w(2 side repeaters plus 4 indicators) the hazard is 4x21. They are the ones in the halfords book for a 1990 mini.

Came home, plugged them in, switched on the hazard one, momentarilly lit then went pop so thats scrap, ignition on tried the indicator one, right hand side indicators work a treat, left hand side the unit clicks(not quite right though) and no lights work, fed up now.

I had to run a feed fro the fuse box to power up the hazard one as the cars wiring has been mullered in the past, then a light green and pink wire back to the switch, I can't see whats going wrong

#7 Dan

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Posted 28 April 2010 - 11:10 PM

Connecting a live to your hazard switch is a mistake. The input to the hazard switch should come from the hazard flasher, which in turn runs from a constant live.

#8 smj

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Posted 29 April 2010 - 07:00 AM

sorry i didn't explain that very clearly, I have taken a live permanent 12v from the fuse box to the flasher unit in the engine bay, this then feeds the switch, but i still managed to pop the flasher unit

#9 Guess-Works.com

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Posted 29 April 2010 - 07:07 AM

Remember the hazard and indicator circuits are separate, only connected through the hazard switch which is why it has so many wires connected to it...

Sounds like you're trying to run the hazards using the indicator flasher which is only designed to power 2 of the 4 main indicators.




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