12 volt supply - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69time · 04-21-2009, 01:40 PM

Trying to connect my holley 600 choke wire to a 12volt source other than my ignition wire. Don't want to steal voltage from my distributor.. Anyone know of another wire that supplies 12 volts only when the ignition is on?

**El Jay** · 04-21-2009, 02:41 PM

Unless you have an HEI, your ignition wire is only about 9 V.
Putting that aside, you should be able to pull a switched 12 V source off your fuse block, someplace.

I'm not trying to be a hard a**, or a butthead, but you can pull off of other circuits there.

I hope that helps you at least a little bit.

LJ

P.S. Welcome to the board!!!!!!!!!!!!!!!!

berencam · 04-21-2009, 02:54 PM

kinda on the same line, i converted to hei, and an electric fuel pump. i have 1 12 gauge wire routed from the ignition, to the right side of the engine where it splits into 3 leads, 1 to hei 1 to choke, and one to pump. that be ok to run that much amperage through that one line? Or should i install some relays and wire directly from the batt?

Sinister · 04-21-2009, 03:01 PM

Quote:

Originally Posted by berencam

kinda on the same line, i converted to hei, and an electric fuel pump. i have 1 12 gauge wire routed from the ignition, to the right side of the engine where it splits into 3 leads, 1 to hei 1 to choke, and one to pump. that be ok to run that much amperage through that one line? Or should i install some relays and wire directly from the batt?

I'd run the fuel pump off a relay at the very least.

**americanmusc1e** · 04-21-2009, 03:05 PM

get a voltmeter and check the open spades in your fusebox for 12 volt sources that come on when your headlights do

Sinister · 04-21-2009, 03:10 PM

Quote:

Originally Posted by americanmusc1e

get a voltmeter and check the open spades in your fusebox for 12 volt sources that come on when your headlights do

You actually want a key on source. You can put on your head lights with the key off.

berencam · 04-21-2009, 03:14 PM

there should be more than one ignition lead coming off the ignition switch you could run it off that.

Elephanthead · 04-21-2009, 03:20 PM

There is a switched connector in the fuse box, run off of that, you don't need the full 12V for a choke, just enough to heat up the element.

69time · 04-21-2009, 03:51 PM

Well, I'm kinda just shooting in the dark here. When I initially installed the Holley 600 I connected the choke wire to the ignition, cranked it and it idled up as it should have then settled back down once warmed up. Did this for two days and now it seems that the choke is not responding at all anymore. So I read the carb manual and read where it stated not to use the ignition wire as the source but to find an alternative 12v ignition activated source and here I am.. I don't have a meter to meassure the open spade in the fuse box and I have upped to the HEI..

sleepertruck72 · 04-21-2009, 04:55 PM

69time,
I'm sure the HEI will like the 12v.
You could get a meter at Wal-mart for around $10. There not the fanciest, but they work and you can keep it in your truck.

**El Jay** · 04-21-2009, 05:08 PM

Quote:

Originally Posted by sleepertruck72

69time,
I'm sure the HEI will like the 12v.
You could get a meter at Wal-mart for around $10. There not the fanciest, but they work and you can keep it in your truck.

Yeah. The HEI requires 12 V to work right.

Do you really need a choke down there in TX?

Up here where I live, It sometimes gets down into the freezing range, but not real often. The choke on my Chevy is blocked open.
When it's really cold, I just pump the throttle twice & then hold it about 1/2 way down. When I hit the starter, it generally fires right off. Sometimes, I admit, I have to crank it a bit; but not real often.

**americanmusc1e** · 04-21-2009, 06:34 PM

Quote:

Originally Posted by Sinister

You actually want a key on source. You can put on your head lights with the key off.

whoops, sorry I meant to say Ignition.

69time · 04-22-2009, 08:59 AM

Quote:

Originally Posted by El Jay

Yeah. The HEI requires 12 V to work right.

Do you really need a choke down there in TX?

Up here where I live, It sometimes gets down into the freezing range, but not real often. The choke on my Chevy is blocked open.
When it's really cold, I just pump the throttle twice & then hold it about 1/2 way down. When I hit the starter, it generally fires right off. Sometimes, I admit, I have to crank it a bit; but not real often.

I guess not but why would it act like that? I mean, the choke seemed to work when I first put the carb on (idleing up on startup and then backing down when warm) and now not doin that at all.. Just makes me think that something is not quite right..

sneakysnake · 04-22-2009, 09:09 AM

You should have "ign unfused" that is key hot, just use an inline fuse.

**americanmusc1e** · 04-23-2009, 09:11 PM

Quote:

Originally Posted by sneakysnake

You should have "ign unfused" that is key hot, just use an inline fuse.

thanks for posting the picture of the fusebox. mine got overspray on it and you can't read it. I have to guess where everything goes.

04-21-2009, 01:40 PM	#1
69time Registered User Join Date: Mar 2009 Location: Bacliff, Tx. Posts: 18	12 volt supply Trying to connect my holley 600 choke wire to a 12volt source other than my ignition wire. Don't want to steal voltage from my distributor.. Anyone know of another wire that supplies 12 volts only when the ignition is on?

04-21-2009, 02:41 PM	#2
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: 12 volt supply Unless you have an HEI, your ignition wire is only about 9 V. Putting that aside, you should be able to pull a switched 12 V source off your fuse block, someplace. I'm not trying to be a hard a*, or a butthead, but you can pull off of other circuits there. I hope that helps you at least a little bit. LJ P.S. Welcome to the board!!!!!!!!!!!!!!!! __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck Last edited by El Jay; 04-21-2009 at 02:42 PM.*

04-21-2009, 02:54 PM	#3
berencam Registered User Join Date: Aug 2007 Location: branson mo Posts: 933	Re: 12 volt supply kinda on the same line, i converted to hei, and an electric fuel pump. i have 1 12 gauge wire routed from the ignition, to the right side of the engine where it splits into 3 leads, 1 to hei 1 to choke, and one to pump. that be ok to run that much amperage through that one line? Or should i install some relays and wire directly from the batt? __________________ 69 chevy c10 350 3 speed manual wood bed build thread here r.i.p. 70 c10 auto 350 build here

04-21-2009, 03:05 PM	#5
americanmusc1e Senior Member Join Date: Jan 2009 Location: Austin, TX Posts: 1,079	Re: 12 volt supply get a voltmeter and check the open spades in your fusebox for 12 volt sources that come on when your headlights do __________________ -- Josh Instagram: @americanmusc1e OLD SKOOL-- 1970 C10. 454/Th400/3.07 posi Build Thread FARM TRUCK----1949 Chevrolet 3800 Power Wagon Hauler Build Thread 1999 4wd OBS Tahoe - daily. DM me if you can't see photos i posted

04-21-2009, 03:14 PM	#7
berencam Registered User Join Date: Aug 2007 Location: branson mo Posts: 933	Re: 12 volt supply there should be more than one ignition lead coming off the ignition switch you could run it off that. __________________ 69 chevy c10 350 3 speed manual wood bed build thread here r.i.p. 70 c10 auto 350 build here

04-21-2009, 03:20 PM	#8
Elephanthead Registered User Join Date: Nov 2008 Location: Carmel, IN Posts: 187	Re: 12 volt supply There is a switched connector in the fuse box, run off of that, you don't need the full 12V for a choke, just enough to heat up the element.

04-21-2009, 03:51 PM	#9
69time Registered User Join Date: Mar 2009 Location: Bacliff, Tx. Posts: 18	Re: 12 volt supply Well, I'm kinda just shooting in the dark here. When I initially installed the Holley 600 I connected the choke wire to the ignition, cranked it and it idled up as it should have then settled back down once warmed up. Did this for two days and now it seems that the choke is not responding at all anymore. So I read the carb manual and read where it stated not to use the ignition wire as the source but to find an alternative 12v ignition activated source and here I am.. I don't have a meter to meassure the open spade in the fuse box and I have upped to the HEI..

04-21-2009, 04:55 PM	#10
sleepertruck72 Registered User Join Date: Nov 2007 Location: Turlock California 95380 Posts: 2,075	Re: 12 volt supply 69time, I'm sure the HEI will like the 12v. You could get a meter at Wal-mart for around $10. There not the fanciest, but they work and you can keep it in your truck. __________________ 72 C20 Longbed 05 1500 Z71 Last edited by sleepertruck72; 04-21-2009 at 04:56 PM.

04-22-2009, 09:09 AM	#14
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	Re: 12 volt supply You should have "ign unfused" that is key hot, just use an inline fuse. Attached Images

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