switched 12 volts

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JF - 15 Mar 2006 05:58 GMT

I'm installing an HEI in my 67 Coupe and would like to know the best
place to find a switched 12 volt source.
Thanks

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Backyard Mechanic - 15 Mar 2006 14:38 GMT

> I'm installing an HEI in my 67 Coupe and would like to know the best
> place to find a switched 12 volt source.
> Thanks

Find the ignition coil ballast resistor. One side of it would go to the
ign switch, the other connected to starter solenoid/relay and coil.

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Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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JF - 15 Mar 2006 20:38 GMT

No ballast resistor in a 67. Just the pink resistance wire from the
ignition switch. I just cut it at the back of the switch and ran my
wire to the HEI, now i have the 12v.
JF

>>I'm installing an HEI in my 67 Coupe and would like to know the best
>>place to find a switched 12 volt source.
>>Thanks
>
> Find the ignition coil ballast resistor. One side of it would go to the
> ign switch, the other connected to starter solenoid/relay and coil.

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Backyard Mechanic - 15 Mar 2006 21:51 GMT

> No ballast resistor in a 67. Just the pink resistance wire from the
> ignition switch. I just cut it at the back of the switch and ran my
> wire to the HEI, now i have the 12v.

Well?

I guess one MIGHT, in a WILD stretch of the Imagination, call that a
BALLAST resistor, huh?

Sheesh! It's NOT what it LOOKS like, it's what it DOES!

Anyway, good on ya for solving it.

Signature

Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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JF - 16 Mar 2006 03:08 GMT

I didn't mean it the way it sounded about the ballast resistor. I know
what you were saying. Resistor wire/ballast resistor all do the same
thing. Strange thing is, when i got the car, there was a ballast
resistor on the right inner fenderwell. Not hooked to anything, but it
was there??
JF

>>No ballast resistor in a 67. Just the pink resistance wire from the
>>ignition switch. I just cut it at the back of the switch and ran my
[quoted text clipped - 8 lines]
>
> Anyway, good on ya for solving it.

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Spike - 16 Mar 2006 03:02 GMT

>I'm installing an HEI in my 67 Coupe and would like to know the best
>place to find a switched 12 volt source.
>Thanks

fuse block works for me...
--

Spike
1965 Ford Mustang Fastback 2+2, Vintage Burgundy
w/Black Std Interior, A Code 289 C4 Trac-Lok;
Vintage 40 16" rims w/225/50ZR16 KDWS BF Goodrich
gForce Radial T/As, Cobra drop; surround sound
audio-video...
See my ride at....
Feb 2004- http://207.36.208.198/albums/86810/003_May_21_3004.jpg
Feb 2004- http://207.36.208.198/albums/86810/005_May_21_2004.jpg
Jul 2005- http://207.36.208.198/albums/86810/davescar_7_11_05_002.jpg
Jul 2005- http://207.36.208.198/albums/86810/Engine_rebuild_006.jpg

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JF - 16 Mar 2006 03:05 GMT

Believe it or not, but i put a meter on a few of the fuses and they all
dropped off when the key was turned to start. Even the big post on the
back of the ignition switch dropped off.
JF

>>I'm installing an HEI in my 67 Coupe and would like to know the best
>>place to find a switched 12 volt source.
[quoted text clipped - 14 lines]
> Jul 2005- http://207.36.208.198/albums/86810/davescar_7_11_05_002.jpg
> Jul 2005- http://207.36.208.198/albums/86810/Engine_rebuild_006.jpg

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Spike - 16 Mar 2006 19:58 GMT

>Believe it or not, but i put a meter on a few of the fuses and they all
>dropped off when the key was turned to start. Even the big post on the
>back of the ignition switch dropped off.
>JF

Did you try each end of each fuse? I ran into a similar situation with
my 65. It actually made a difference (though I have no idea why).
And I was able to track down what I needed for both constant and
switched.
--

Spike
1965 Ford Mustang Fastback 2+2, Vintage Burgundy
w/Black Std Interior, A Code 289 C4 Trac-Lok;
Vintage 40 16" rims w/225/50ZR16 KDWS BF Goodrich
gForce Radial T/As, Cobra drop; surround sound
audio-video...
See my ride at....
Feb 2004- http://207.36.208.198/albums/86810/003_May_21_3004.jpg
Feb 2004- http://207.36.208.198/albums/86810/005_May_21_2004.jpg
Jul 2005- http://207.36.208.198/albums/86810/davescar_7_11_05_002.jpg
Jul 2005- http://207.36.208.198/albums/86810/Engine_rebuild_006.jpg

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JF - 18 Mar 2006 05:18 GMT

Nope, never thought of that. But i will keep that in mind for future
reference.
JF

>>Believe it or not, but i put a meter on a few of the fuses and they all
>>dropped off when the key was turned to start. Even the big post on the
[quoted text clipped - 18 lines]
> Jul 2005- http://207.36.208.198/albums/86810/davescar_7_11_05_002.jpg
> Jul 2005- http://207.36.208.198/albums/86810/Engine_rebuild_006.jpg

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drsmith - 21 Mar 2006 00:02 GMT

>Believe it or not, but i put a meter on a few of the fuses and they all
>dropped off when the key was turned to start. Even the big post on the
>back of the ignition switch dropped off.
>JF

Physics. The internal resistance of the battery coupled with the
high amperage required to turn the engine over will cause a voltage
drop. ...or are you talking about just turning the switch to the
'run' position and you get the voltage drop?

If you're turning the engine over, there's just no way to avoid a
voltage drop and the voltage you read could be as low as 6 volts.
Of course, the wire in the wiring harness has a certain ohms/ft
resistance that could also affect your reading, but it wouldn't be
significant unless you were reading the voltage right off the back
of the starter itself.

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