[Diy_efi] Key-On Power for 7730

[Don Sauman]

Not absolutely certain of your wiring arrangement, but it is usual to 
put a reverse biased diode across relay coils to suppress back-EMF.

Don

Clair Davis wrote:

>Hehehe... I've had more cars with starter buttons than I care to think
>about.  It's one of those little items that would be used by my wife or
>mother (Dad's a victim, too) as evidence that we'd hacked on a car...
>Agreed though on the cool factor of one of the big S-2000 buttons.  If I
>were to get one of those, I'd check the Honda dealer first, and I'm sure
>there are some aftermarket solutions, too.
>
>Got my wiring done today.  I came this >< close to using a relay to power
>the coil with power to the small side of the relay coming from the two key
>switches.  Checking again, the relay would not have powered off through the
>key operation, but using a 9V battery to run things test, I "noticed" a BIG
>voltage spike when I broke the circuit.  I had to be holding the relay a
>certain way to do it, but I suspect it was just like an ignition coil.  I
>can't swear that it would have had any affect on the ECM, but I didn't want
>to risk it.  It really felt like a good "tingle" you get when brushing up
>too close to a bare 120V house wire.  Hot enough to feel through my finger,
>and this from a little 9V battery.
>
>Not quite off-topic, how much current does a typical "oil can" coil draw on
>the (+) terminal?  This is a Jacobs Energy Coil steel cylinder oil-filled
>unit if that makes a difference.  OEM has 18ga wires running power to the
>coil, so I'm guessing those will continue to be fine.
>
>Clair
>
>
>----- Original Message ----- 
>From: "Joe Boucher" <boucherj at prodigy.net>
>To: <diy_efi at diy-efi.org>
>Sent: Saturday, September 30, 2006 5:28 PM
>Subject: RE: [Diy_efi] Key-On Power for 7730
>
>
>  
>
>>How about this idea.  Install a start button that is energized when the
>>    
>>
>key
>  
>
>>is in the on position.  Turn key to on, press starter button.
>>
>>That's kinda cool.  I like starter buttons.
>>
>>The Honda S2000 has one and a couple of other high end, late model cars.
>>Probably not something you would casually find in a  a low end junkyard.
>>
>>But it sounds like you don't have problem other than finding the key.
>>
>>-----Original Message-----
>>From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
>>Behalf Of Clair Davis
>>Sent: Thursday, September 28, 2006 9:48 PM
>>To: Rick McLeod; diy_efi at diy-efi.org
>>Subject: Re: [Diy_efi] Key-On Power for 7730
>>
>>
>>This, folks, appears to be true here, too.  I basically made a little test
>>light circuit to see if there was an obvious break in the circuit between
>>IGN-1 and IGN-2.  Using an 1187 dash light, I wired I1 and I2 (and ACC
>>    
>>
>just
>  
>
>>for fun) together with a 9V battery.  I could not see any dimming of the
>>bulb between run and start, regardless of how fast or slow I turned the
>>    
>>
>key.
>  
>
>>Turning the key was the big problem, as I had to disassemble the dang lock
>>tumbler to make the motion consistent.  Kind of hated to do that, as 1969
>>ignition cylinders are unique (last year for dash-mounting for Mopar) but
>>I've got NO idea where the key for that sucker is.  Not much of a
>>theft-deterrent at this point.
>>
>>Thanks, Rick, Tom, Tim, Will, and Lee for all the guidance.  Maybe I'll
>>finally get these last two wires done this weekend!
>>
>>Clair
>>
>>
>>----- Original Message -----
>>From: "Rick McLeod" <dunvegan at sbcglobal.net>
>>To: <diy_efi at diy-efi.org>
>>Sent: Thursday, September 28, 2006 12:39 PM
>>Subject: Re: [Diy_efi] Key-On Power for 7730
>>
>>
>>    
>>
>>>Good advise, but every ignition I've ever seen though has been MBB, not
>>>      
>>>
>>BBM. (Make Before Break vs. Break Before Make)
>>    
>>
>>>      
>>>
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>>    
>>
>
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>  
>

-- 
Don Sauman
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