Jamescorsa97
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Registered: 19th Aug 04
Location: Middlesbrough Drives: Cliosport 182
User status: Offline
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A friend of mine wants to wire up a red l.e.d so it looks like he has an alarm!
I told him to just get an alarm but he refuses!
Does anyone know where it could be wired from and how to do it?
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RKS
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Registered: 2nd Mar 04
Location: Gloucestershire UK
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If he gets a red flashing led just wire the live wire to a permanent live and the negative wire to an ignition live,
I have been told that when the ignition is off it becomes an earth therefore the LED will only work whilst the ignition is turned off
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Rob_Corsa
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Registered: 4th Apr 02
Location: Derbyshire
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looking at the wiring diagram there is no ground in the ignition switch of a corsa so im thinking your mate was talking about a diferent car?
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Jamescorsa97
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Registered: 19th Aug 04
Location: Middlesbrough Drives: Cliosport 182
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yes man hes talking about a pug 206 sorry forgot to mention!
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stubs
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Registered: 30th Jun 02
Location: Bolton
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The method mentioned by Rikki will work on your mates car.
If you test the ignition wire, it will show -ve when the ignition is turned off.
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stubs
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Registered: 30th Jun 02
Location: Bolton
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quote:
Originally posted by Rob_Corsa
looking at the wiring diagram there is no ground in the ignition switch of a corsa so im thinking your mate was talking about a diferent car?
That is correct... the diagram will not show any direct earth connections to the ignition circuit, as this would obviously cause a short when +12v is applied (i.e. ignition turned on).
The "earth" that the LED see's, is an in-direct earth, via the ignition circuit's components.
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tommy_d_17
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Registered: 10th Sep 05
Location: Herts
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get 1 of these http://cgi.ebay.co.uk/1-5v-Single-Flashing-LED-Alarm-CCTV-Dummy-Light_W0QQitemZ5834136116QQcategoryZ48636QQcmdZViewItem
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Ally
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Registered: 2nd Jul 03
Location: Pontypool Drives: a Skoda
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This one will be more appropriate, its the same one used for alarms.
http://www.maplin.co.uk/module.aspx?ModuleNo=22905&doy=27m11
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Rob_Corsa
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Registered: 4th Apr 02
Location: Derbyshire
User status: Offline
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quote:
Originally posted by stubs
quote:
Originally posted by Rob_Corsa
looking at the wiring diagram there is no ground in the ignition switch of a corsa so im thinking your mate was talking about a diferent car?
That is correct... the diagram will not show any direct earth connections to the ignition circuit, as this would obviously cause a short when +12v is applied (i.e. ignition turned on).
The "earth" that the LED see's, is an in-direct earth, via the ignition circuit's components.
If that was true then you would deffo get a short when the ignition was turned on!
Also if the switched ignition wires shows 0v with respect to ground it dosent mean its earthed, could be either earthed or open circuit.
[Edited on 27-11-2005 by Rob_Corsa]
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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Rob it does work, go try it for yourself.
Most of the components the ignition lives go to switch back to a very very minor earth when they have no lives going to them.
It does work.
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Jamescorsa97
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Registered: 19th Aug 04
Location: Middlesbrough Drives: Cliosport 182
User status: Offline
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quote:
Originally posted by Ally
This one will be more appropriate, its the same one used for alarms.
http://www.maplin.co.uk/module.aspx?ModuleNo=22905&doy=27m11
He has this l.e.d and wants to wire it from the hazard switch.....
I know exactly how to do this but i just can't tell which wire is which on his car. Wires there are Grey, yellow, brown, blue
Any idea?
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cunningham
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Registered: 25th May 05
Location: Lochore, Fife
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browns live
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Rob_Corsa
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Registered: 4th Apr 02
Location: Derbyshire
User status: Offline
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quote:
Originally posted by Richie
Rob it does work, go try it for yourself.
Most of the components the ignition lives go to switch back to a very very minor earth when they have no lives going to them.
It does work.
Will take your word for it mate, its too cold to go out and remove steering surround. 
Will remember for when im wiring something up in the future.
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stubs
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Registered: 30th Jun 02
Location: Bolton
User status: Offline
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You don't need to remove your sterring shroud.. you should find that there's an ignition live in the cigarette lighter socket - test that!
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Adam-D
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Registered: 11th May 02
Location: Cheshire
User status: Offline
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£40 will buy a cheap noisy alarm
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