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PostPosted: Fri Dec 21, 2018 3:51 pm 
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Supercharged

Joined: Wed Sep 17, 2008 6:48 pm
Posts: 2679
Location: Indianapolis
Car Model*:
I will be rewiring the 68 Barracuda over the winter months.
I currently have the battery relocated to the rear, and there is a disconnect
switch installed that will shut down the motor when the switch is opened.
The disconnect is wired similar to the first diagram, with one of the alternator field
wires connected to the disconnect post.

That system works, but the main power cable from the disconnect up to the starter post
is always hot while the disconnect is closed.
I do have fuses after that.

I have been considering installing a Ford Solenoid, similar to the second diagram.
That system has power to the starter only when the starter is engaged.

Adds complexity, but seems like a better way, but on the other hand I do have a disconnect
in the system.

any thoughts on this ?


Attachments:
File comment: current disconnect wiring
disconnect wiring to kill motor and alternator.jpg
disconnect wiring to kill motor and alternator.jpg [ 28.9 KiB | Viewed 2560 times ]
File comment: diagram with solenoid
Wiringmods_zps19df8022.1.jpg
Wiringmods_zps19df8022.1.jpg [ 58.79 KiB | Viewed 2560 times ]
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PostPosted: Fri Dec 21, 2018 5:33 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6088
Location: So California
Car Model*: 64 Plymouth Valiant
The second diagram is a bit too small (even after clicking on it) and I can't see what's going on with it.


Anyway, with a rear battery I'd feel a lot better with a ford-style solenoid next to the battery for the large cable running to the starter............

_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes
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PostPosted: Fri Dec 21, 2018 6:35 pm 
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Turbo Slant 6

Joined: Sat Feb 18, 2006 2:19 pm
Posts: 851
Car Model*:
Could not see second diagram . A long big not fused wire could be a safety risk. Put that ford solenoid back at battery for starter wire only. Separate wire fused at battery for ignition, alternator etc. Or if one wire system from battery is needed, find a large max fuse,200 amp? for use at battery. The longer the wire the
more chance for shorts.


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PostPosted: Sat Dec 22, 2018 12:01 pm 
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Supercharged

Joined: Wed Sep 17, 2008 6:48 pm
Posts: 2679
Location: Indianapolis
Car Model*:
I had to reduce the size of the diagram to get it to upload here at .org

I have copied it to Flicker and you should be able to see a full size copy at

https://www.flickr.com/photos/13718356@ ... datetaken/

This is not one that I originated, I copied it from a posting at FABO.
This one makes more sense than most that I have found, but I don't think that
it will shut off a running motor by opening the disconnect,
I contacted the person that drew the diagram and he said that the car will not start
with the disconnect open, but he has not tried shutting down the motor by opening the disconnect.


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PostPosted: Sat Dec 22, 2018 9:46 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6088
Location: So California
Car Model*: 64 Plymouth Valiant
It looks like once the engine is running, it will stay running even with the battery disconnected.

Alternator output would need it's own separate connection to the battery (with separate disconnect)

_________________
Ed

64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

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PostPosted: Sun Dec 23, 2018 3:30 am 
Online
SL6 Racer & Moderator
User avatar

Joined: Sat Oct 19, 2002 12:06 pm
Posts: 7220
Location: Silver Springs, Fl.
Car Model*:
emsvitil wrote:
It looks like once the engine is running, it will stay running even with the battery disconnected.



Correct

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 225 nitrous
64 Valiant Signet
64 Valiant 4dr 170


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