Rosco
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| posted on 28/3/11 at 07:47 AM |
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Wiring for starter button
I'm planning to put a starter button on my 4AGE but have no idea how much current the solenoid circuit will take.
I'm working on the basis that the starter button I've bought (one of those smart looking alloy effect ones from CBS, Europa, SVC...)
isn't up to the job on it's own and I need a relay, possibly with a fly-wheel diode.
Anyone any idea of solenoid current or rating for starter buttons, or just thoughts on best practice ........
Thanks
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cliftyhanger
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| posted on 28/3/11 at 08:18 AM |
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solenoid takes very little current to activate it, that is their whole purpose. A couple of amps maximum at a guess. Not sure why a diode may be
needed?
When I did one, I fed the starter switch from an ignition controlled circuit straight to the solenoid. (old car though!)
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Rosco
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| posted on 28/3/11 at 08:54 AM |
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Thanks for your feedback
For info, a fly-wheel diode is sometimes used on highly inductive loads to dissipate the back emf created by a collapsing magnetic field when you
release the switch. It protects the contacts from the arc you get when you open the switch. At least that's the theory - but I'll need
to give some though as to whether it's a good idea on a battery-driven circuit.
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zetec
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| posted on 28/3/11 at 09:04 AM |
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I used a relay with the feed from the ignition light, means the starter cant be engaged once the engine has started, works a treat.
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scudderfish
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| posted on 28/3/11 at 10:28 AM |
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quote:
Originally posted by zetec
I used a relay with the feed from the ignition light, means the starter cant be engaged once the engine has started, works a treat.
Oooo, I like that idea, I'm going to do that.
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DaveFJ
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| posted on 28/3/11 at 12:13 PM |
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I heard various stories about people having issues with the ignition light extinguishing before the engine had starteed properly and the starte
cutting out....
therefore i have wired my new starter button relay into a microswitch mounted below the handbrake so that the starter button only works when the
handbrake is on. was the best and easiest compromise i couls come up with 
I especially want to isolate my starter button when driving because it is integrated into my gear knob!  
Dave
"In Support of Help the Heroes" - Always
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