CosKev3
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| posted on 21/10/14 at 09:57 AM |
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R1 start wire
My R1 eng start wire needs -12v to start the engine, I want to use the sierra ign barrel to start the engine.
Am I right in thinking to do this, as the start position of sierra barrel puts out a +12v, I need to wire in a relay that will switch on the required
-12v to start eng?
Or any other way easier I'm over looking? 
Cheers.
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owelly
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| posted on 21/10/14 at 10:38 AM |
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-12v? How will you find that?
http://www.ppcmag.co.uk
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Johneturbo
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| posted on 21/10/14 at 10:56 AM |
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I though the R1 was just a wire to ground to start it blue/white if memory is correct
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Barkalarr
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| posted on 21/10/14 at 11:42 AM |
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I did exactly this on my R1 engine and sierra ignition barrel.
The start button on the R1 loom just makes a circuit. Nothing else.
All I did was wire in a relay which just made a circuit when I turned the key, thus simulating the start button being pushed.
This was the diagram I used:
 
Description
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adithorp
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| posted on 21/10/14 at 12:24 PM |
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The R1 start is triggered by earthing the start wire (blue from memory). I'm guessing by "-12v" you mean earth.
To use the sierra ingnition barrel wire that to trigger a relay that switches to earth as you described.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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CosKev3
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| posted on 21/10/14 at 03:01 PM |
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Yeah that whats I meant!
Cheers for confirming.
quote:
Originally posted by owelly
-12v? How will you find that?
Thanks for your helpful input, always one cocky knob ain't there...........
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