‘68 keyed and cranking hot??
Thread Starter
Drifting
Joined: Jul 2020
Posts: 1,501
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From: San Diego
‘68 keyed and cranking hot??
I am trying to tap into a keyed and cranking hot for my Holley Sniper system. If I go to the ignition switch, which color is keyed hot and cranking hot? Is it PINK?
Le Mans Master
Joined: Jan 2001
Posts: 6,741
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I suspect it is like my 68. Find the terminal labeled IGN on the fuse box. You can tap there and it should be hot in START and RUN.
I initially ran my EFI controls off that terminal but eventually I installed a relay that picks up from there and the actual power comes from the Horn Relay terminal.
But you can the IGN terminal to power up the control side of the system and get the system going anyway.
I initially ran my EFI controls off that terminal but eventually I installed a relay that picks up from there and the actual power comes from the Horn Relay terminal.
But you can the IGN terminal to power up the control side of the system and get the system going anyway.
Thread Starter
Drifting
Joined: Jul 2020
Posts: 1,501
Likes: 323
From: San Diego
I checked the IGN but while it is hot while cranking it remains hot with the key off. The only way to kill it is to completely cut my battery which does have a kill switch on it. I know something somewhere is wired wrong to keep this hot after the key turns off but I want to try at the switch.
Race Director
Joined: May 2006
Posts: 18,729
Likes: 2,579
I checked the IGN but while it is hot while cranking it remains hot with the key off. The only way to kill it is to completely cut my battery which does have a kill switch on it. I know something somewhere is wired wrong to keep this hot after the key turns off but I want to try at the switch.
Thread Starter
Drifting
Joined: Jul 2020
Posts: 1,501
Likes: 323
From: San Diego
So mine are not labeled but I checked and what I get is
Bottom:
- Key off - 12v power
- key on - 12v power
-cranking - 12v power
Middle:
Key off - no power
key on - 12v power
cranking - no power
Top:
Key off - no power
key on - 12v power
cranking - no power
What I need is something with no power when the key is off and then key on with power and cranking with power. I understand that my IGN one for the bottom should be that one but I believe someone wired this car rather weird many years ago.
Bottom:
- Key off - 12v power
- key on - 12v power
-cranking - 12v power
Middle:
Key off - no power
key on - 12v power
cranking - no power
Top:
Key off - no power
key on - 12v power
cranking - no power
What I need is something with no power when the key is off and then key on with power and cranking with power. I understand that my IGN one for the bottom should be that one but I believe someone wired this car rather weird many years ago.
Le Mans Master
Joined: Dec 2006
Posts: 5,557
Likes: 9
From: Oquirrh Mountains
St. Jude Donor '09
So mine are not labeled but I checked and what I get is
Bottom:
- Key off - 12v power
- key on - 12v power
-cranking - 12v power
Middle:
Key off - no power
key on - 12v power
cranking - no power
Top:
Key off - no power
key on - 12v power
cranking - no power
What I need is something with no power when the key is off and then key on with power and cranking with power. I understand that my IGN one for the bottom should be that one but I believe someone wired this car rather weird many years ago.
Bottom:
- Key off - 12v power
- key on - 12v power
-cranking - 12v power
Middle:
Key off - no power
key on - 12v power
cranking - no power
Top:
Key off - no power
key on - 12v power
cranking - no power
What I need is something with no power when the key is off and then key on with power and cranking with power. I understand that my IGN one for the bottom should be that one but I believe someone wired this car rather weird many years ago.
Thread Starter
Drifting
Joined: Jul 2020
Posts: 1,501
Likes: 323
From: San Diego
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Is my vette stock?? HAHA
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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you have a wiring issue. I tapped off the IGN for my sniper. I used it to power a relay that triggered a hot wire from the battery to a secondary fuse block
Race Director
Joined: May 2006
Posts: 18,729
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Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,209
Likes: 9,347
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
I think that yellow wire is hot all the time as well
Le Mans Master
Joined: Jan 2001
Posts: 6,741
Likes: 1,383
Jd21476
I concur. You need to solve your wiring issues before hooking anything else up to the system. I've been using IGN for decades.
I concur. You need to solve your wiring issues before hooking anything else up to the system. I've been using IGN for decades.
Le Mans Master
Joined: Jan 2001
Posts: 6,741
Likes: 1,383
Thread Starter
Drifting
Joined: Jul 2020
Posts: 1,501
Likes: 323
From: San Diego
Yeah, its just odd to me that the IGN would not be hot while cranking. The car starts and runs fine but the issue that I have is that my Holley Sniper will remains on all the time and drain the battery unless I use the battery kill switch. I believe by doing this it clears the LEARN every time unless somoene knows if that makes no difference. I really dont mind turning the battery off cause I have a quick disconnect on the terminal but I just dont know if it clears the computer on the Holley Sniper.
Drifting
Joined: Mar 2011
Posts: 1,347
Likes: 121
From: Kernersville NC
Yeah, its just odd to me that the IGN would not be hot while cranking. The car starts and runs fine but the issue that I have is that my Holley Sniper will remains on all the time and drain the battery unless I use the battery kill switch. I believe by doing this it clears the LEARN every time unless somoene knows if that makes no difference. I really dont mind turning the battery off cause I have a quick disconnect on the terminal but I just dont know if it clears the computer on the Holley Sniper.
Just to be certain, the IGN terminal is the bottom one, in the middle, right above the little INST LPS fuse.
Last edited by flyeri; Dec 7, 2022 at 12:34 PM.