12 volt source for choke
Thread Starter
Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
12 volt source for choke
Holley's instruction say "suitable ignition activated 12-volt sources are most electrical relays, as well as the leads to accessories, such as windshield wipers."
Any suggestions on an under-hood source in our cars? The old Holley was hooked to the coil, which Holley says not to use.
:cheers:
Any suggestions on an under-hood source in our cars? The old Holley was hooked to the coil, which Holley says not to use.
:cheers:
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
Re: 12 volt source for choke (foundvettelifeisgood)
Early 70s have orange and beige wires underhood that activated various emissions parts. I would try one of those. Particularly there is an orange wire I think meant for the TCS circuit on the back of the rh head. Try that one with your voltmeter and see when it has power.
C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
Likes: 2
From: Twin Cities Minnesota
Re: 12 volt source for choke (markdtn)
Horn relay.
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
3rd Gear
Joined: Jun 2002
Posts: 3
Likes: 0
From: Chandler AZ
Re: 12 volt source for choke (427V8)
Horn relay.
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: 12 volt source for choke (foundvettelifeisgood)
I ran a wire through the 4 hole grommet in the firewall to the fuse block spade marked 'IGN', it only has power when the ign is on.
Senior Member since 1492
Joined: Aug 2000
Posts: 87,920
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: 12 volt source for choke (foundvettelifeisgood)
When I was running an Edelbrock w/elec choke, I spliced the red wire to the wiper motor. You couldn't miss mine, it was red and laying right on top. :lol:
Race Director
Joined: Jun 2000
Posts: 10,039
Likes: 669
From: FL
Re: 12 volt source for choke (RedHotVettes)
Horn relay.
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
If so, make sure it's hot only when the key is on. If you have a constant 12V+ to the choke, it won't do you any good.
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
If so, make sure it's hot only when the key is on. If you have a constant 12V+ to the choke, it won't do you any good.
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C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
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From: Twin Cities Minnesota
Re: 12 volt source for choke (SteveG75)
Oops :bb
I forgot about that. I run a relay block up by the horn relay so all power comes off the horn relay and is switched by a wire going to the fuse block.
This way all power comes off the right spot and there is very little drain on the ignition switch
I forgot about that. I run a relay block up by the horn relay so all power comes off the horn relay and is switched by a wire going to the fuse block.
This way all power comes off the right spot and there is very little drain on the ignition switch
Horn relay.
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
If so, make sure it's hot only when the key is on. If you have a constant 12V+ to the choke, it won't do you any good.
I went through the firewall to the IGN terminal on the fuse box. Since the horn relay is hot all the time, the choke will be warmed up all the time and never function correctly.
All power should come from the horn relay.
Thats where the Altenator senses voltage.
If you take power from anywhere else you're gonna confuse the altenator
( thats Bad )
If so, make sure it's hot only when the key is on. If you have a constant 12V+ to the choke, it won't do you any good.
I went through the firewall to the IGN terminal on the fuse box. Since the horn relay is hot all the time, the choke will be warmed up all the time and never function correctly.
Le Mans Master
Joined: Feb 1999
Posts: 6,807
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From: Hoosier
Cruise-In III Veteran
Re: 12 volt source for choke (Fevre)
I ran a wire through the 4 hole grommet in the firewall to the fuse block spade marked 'IGN', it only has power when the ign is on.
Team Owner
Joined: Apr 2002
Posts: 62,198
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From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
Re: 12 volt source for choke (AlwaysWave)
I put mine to the postive terminal on the coil the short little wire that comes with it is the perfect length
Le Mans Master
Joined: Oct 2002
Posts: 7,098
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From: Las Vegas - Just stop perpetuating myths please.
Re: 12 volt source for choke (foundvettelifeisgood)
Okay the best source I have read about for this is that wiper motor wire that stays hot all the time. But unless you can live with a hot choke even when engine is off and ignition switch is in Accessory or Run then you need to relay this choke power wire with the oil press switch sender unit. This will turn off choke power when oil press is low (engine off).
When the engine is running the choke is supposed to be on/hot all the time to keep the choke blade open. But when the engine is off so should be choke power to cool off choke element and close choke again for start up.
The coil is the wrong place to source power as is draws its current through a resistor wire (or resistor ballast) and that will in turn drop voltage to coil for making sparks. :thumbs:
When the engine is running the choke is supposed to be on/hot all the time to keep the choke blade open. But when the engine is off so should be choke power to cool off choke element and close choke again for start up.
The coil is the wrong place to source power as is draws its current through a resistor wire (or resistor ballast) and that will in turn drop voltage to coil for making sparks. :thumbs:
