Installing extra "ign" terminals? - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 14 (permalink) Old May 5th, 16, 8:25 PM Thread Starter
Team Member
 
Join Date: Sep 2002
Location: Sparta, TN
Posts: 4,853
Installing extra "ign" terminals?

The "ign" terminal in my '69 Malibu is getting a bit crowded, so I thought it might be a good idea to install an extra fuse box with separately fused terminals. Got the ignition hooked up to it, and I don't want the engine to die if something else blows the fuse

Haven't really thought much about what to use, where to put it etc, but the first thing on the agenda is to figure out where to pick up switched 12V. What would be the best place?

1969 Malibu in progress
Olle is offline  
Sponsored Links
Advertisement
 
post #2 of 14 (permalink) Old May 5th, 16, 8:44 PM
Tech Team
Jim
 
Join Date: Feb 2009
Location: San Jose, CA
Posts: 337
Re: Installing extra "ign" terminals?

I think you'll still need to get this off of the existing IGN circuit since it comes from the key switch. What you could do is use that to power a relay that then supplies power to an additional fuse box wired off the battery. Similar to how some have run their headlights directly off the battery, with the light switch only carrying a small amount of current to close the relay.

jim
Jim's69Ragtop is offline  
post #3 of 14 (permalink) Old May 5th, 16, 8:57 PM Thread Starter
Team Member
 
Join Date: Sep 2002
Location: Sparta, TN
Posts: 4,853
Re: Installing extra "ign" terminals?

Quote:
Originally Posted by Jim's69Ragtop View Post
I think you'll still need to get this off of the existing IGN circuit since it comes from the key switch. What you could do is use that to power a relay that then supplies power to an additional fuse box wired off the battery. Similar to how some have run their headlights directly off the battery, with the light switch only carrying a small amount of current to close the relay.

jim
That's a pretty neat idea. I don't want to cut or splice any wires (the original wiring is in perfect condition), so a relay would be a good way to tap some extra juice "straight from the source".

Any other ideas?

1969 Malibu in progress
Olle is offline  
 
post #4 of 14 (permalink) Old May 6th, 16, 10:45 AM
Senior Tech Team
Bryan
 
Join Date: Apr 2007
Location: San Antonio, Texas
Posts: 5,062
Re: Installing extra "ign" terminals?

I did something similar when I rewired my Falcon based Ranchero.
To take the load from the ignition switch, the Ignition buss and the Accessory buss are triggered by relays.
Nothing but the coil and a couple of relays are tied to the ignition switch.


Use your existing IGN port to power the coil on a relay to a remote buss or fuseblock

Bryan's toyz

59 ElCamino 454/TKO 5spd--(daddy)
66 ElCamino 3oh7/TKO 5spd (mousey) Almost done
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
On the street now!!!
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

65 Ranchero v8/4-spd, that my uncle bought new
Bryan59EC is offline  
post #5 of 14 (permalink) Old May 6th, 16, 10:50 AM
Gold Founding Member
Administrator
 
Join Date: Aug 1998
Location: near Kansas City
Posts: 60,872
Garage
Re: Installing extra "ign" terminals?

Good advice, using relays.

.
.
.
.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Dean is offline  
post #6 of 14 (permalink) Old May 6th, 16, 7:43 PM Thread Starter
Team Member
 
Join Date: Sep 2002
Location: Sparta, TN
Posts: 4,853
Re: Installing extra "ign" terminals?

I might be overly cautions, but would it be a good idea to put an inline fuse on the main feed from the battery? Or would it be ok to just run a hot wire straight through the relay?

1969 Malibu in progress
Olle is offline  
post #7 of 14 (permalink) Old May 6th, 16, 9:26 PM
Gold Founding Member
Administrator
 
Join Date: Aug 1998
Location: near Kansas City
Posts: 60,872
Garage
Re: Installing extra "ign" terminals?

Always fuse any circuit close to its source.

.
.
.
.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Dean is offline  
post #8 of 14 (permalink) Old May 6th, 16, 10:32 PM
Lifetime Premium Member
 
Join Date: Jul 2005
Location: Houston, TX
Posts: 4,726
Re: Installing extra "ign" terminals?

I have a parts store Buss AGC terminal block (six fuse) mounted next to the stock fuse box on my '67. It has circuits for stereo, torque converter clutch, alarm system, indirect lighting and a couple I can't recall. It is tapped directly off the ignition spade lug on the factory fuse lock. If I were to do it again, I'd probably have the auxiliary fuse block on a relay from battery power with the relay coil fired off the ignition terminal. That said, my headlights are not powered off the main fuse block so I'm net positive (lower) on amps on the main fuse block.

Zeke

67 Chevelle
64 Chevelle
90 Corvette ZR1
TC# 3094 ACES# 7297
zeke67 is offline  
post #9 of 14 (permalink) Old May 6th, 16, 11:33 PM Thread Starter
Team Member
 
Join Date: Sep 2002
Location: Sparta, TN
Posts: 4,853
Re: Installing extra "ign" terminals?

Quote:
Originally Posted by Dean View Post
Always fuse any circuit close to its source.
Thanks, that's exactly what I wanted to do!

Now I need the components... bear with me, I'm a dummy when it comes to wiring and electrical stuff in general... First off, I need a fuse box. I haven't looked much further than eBay yet, but all I could find was "straight through" boxes, where each fuse has an "in" and an "out" terminal. Or in other words: A box full of inline fuses, like this one: Universal 12V 8WAY Car Truck Automotive Blade Fuse Box Holder Circuit with Cover | eBay . I would rather have one where you only connect one 12V feed wire, or do you just need to piggy back the terminals on the feed side?

Suggestions on feed wire and fuses would also be great, especially on the feed wire. How many amps and what size feed wire would you think I need?

1969 Malibu in progress
Olle is offline  
post #10 of 14 (permalink) Old May 7th, 16, 10:10 AM
Senior Tech Team
Eric
 
Join Date: Aug 2011
Location: Poteau, Ok
Posts: 4,050
Re: Installing extra "ign" terminals?

You can create a bus by hooking all the terminals together on one side of the fuse block. I would use a minimum of a 10ga wire soldered to each terminal. Then use a 30a relay to power it up in the key on position and a direct feed from the battery to the fuse block. Putting a fuse on the feed wire is optional if the fuse block remains under the hood.

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
oldcutlass is offline  
post #11 of 14 (permalink) Old May 8th, 16, 6:21 PM Thread Starter
Team Member
 
Join Date: Sep 2002
Location: Sparta, TN
Posts: 4,853
Re: Installing extra "ign" terminals?

Quote:
Originally Posted by oldcutlass View Post
You can create a bus by hooking all the terminals together on one side of the fuse block. I would use a minimum of a 10ga wire soldered to each terminal. Then use a 30a relay to power it up in the key on position and a direct feed from the battery to the fuse block. Putting a fuse on the feed wire is optional if the fuse block remains under the hood.
I might put one under the hood and one inside the car, haven't decided yet but I want a fuse on it regardless.

So a 10 gauge wire would be enough to feed this?

Edit: This one looks pretty neat, one wire coming in and 6 terminals, plus LED indicators: 1 Power in 6 Way Auto Circuit Fusebox Blade Terminal Holder LED Warning 12V DC | eBay

1969 Malibu in progress

Last edited by Olle; May 8th, 16 at 7:00 PM.
Olle is offline  
post #12 of 14 (permalink) Old May 8th, 16, 7:02 PM
Senior Tech Team
Eric
 
Join Date: Aug 2011
Location: Poteau, Ok
Posts: 4,050
Re: Installing extra "ign" terminals?

What all are you going you hook up? What is the total load if you add all the items up? Answer these questions and that will tell you what size wire you need.

Use this chart:
http://www.sunforceproducts.com/Supp...ctionTable.pdf

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
oldcutlass is offline  
post #13 of 14 (permalink) Old May 8th, 16, 8:09 PM Thread Starter
Team Member
 
Join Date: Sep 2002
Location: Sparta, TN
Posts: 4,853
Re: Installing extra "ign" terminals?

Quote:
Originally Posted by oldcutlass View Post
What all are you going you hook up? What is the total load if you add all the items up? Answer these questions and that will tell you what size wire you need.

Use this chart:
http://www.sunforceproducts.com/Supp...ctionTable.pdf
I don't know exactly, most of the terminals will be "just in case". Right now I have ignition, light warning and tach, and will need to hook up electric choke and stereo later. I'm thinking about installing two rear window fans as well, so in short: I want a fairly good amount of spare terminals for future accessories. I'll probably figure it for 15 amp per fuse and go from there.

1969 Malibu in progress
Olle is offline  
post #14 of 14 (permalink) Old May 9th, 16, 8:51 AM
Senior Tech Team
Eric
 
Join Date: Aug 2011
Location: Poteau, Ok
Posts: 4,050
Re: Installing extra "ign" terminals?

If you place it close (less than 3') to the battery then 10ga should be fine.

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
oldcutlass is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in









Old Thread Warning
This Thread is more than 1169 days old. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
If you still feel it is necessary to make a new reply, you can still do so though.

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome