Distribution block or Junction block? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 13 Old 06-22-2009, 01:21 AM Thread Starter
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Question Distribution block or Junction block?

I have many + leads (5) coming from an electric fan, water pump, msd etc. going from the front of the car to the rear battery + post. I have been told I need a distribution block or a junction block near the front of the car then one 2 gauge wire going back to the battery. I was told that the way I have the wires ran through the car now will drop voltage over a distance with the gauge wire I am using and may melt the wires or cause a fire.

Does anyone have a picture of one of these installed or what a junction block looks like or what I should use?

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post #2 of 13 Old 06-22-2009, 01:49 AM
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I used the stock starter solenoid post, and ran a 2/0 welding cable to the kill switch mounted behind the rear plate then to battery in the trunk. I'm running dual electric fans, an MSD-6BTM box, a 200-amp alt, and all the other stock electrical stuff.


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post #3 of 13 Old 07-06-2009, 09:56 PM
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Quote:
Originally Posted by SonicFox View Post
I used the stock starter solenoid post, and ran a 2/0 welding cable to the kill switch mounted behind the rear plate then to battery in the trunk. I'm running dual electric fans, an MSD-6BTM box, a 200-amp alt, and all the other stock electrical stuff.
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post #4 of 13 Old 07-06-2009, 10:10 PM
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post #5 of 13 Old 07-07-2009, 06:23 AM
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post #6 of 13 Old 07-07-2009, 01:12 PM
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great post. I have similar issue as you. Now I have some idea.
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post #7 of 13 Old 07-08-2009, 11:30 PM
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Quote:
Originally Posted by SonicFox View Post
I used the stock starter solenoid post, and ran a 2/0 welding cable to the kill switch mounted behind the rear plate then to battery in the trunk. I'm running dual electric fans, an MSD-6BTM box, a 200-amp alt, and all the other stock electrical stuff.
Have you tried shutting your car down with that kill switch while it was running?
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post #8 of 13 Old 07-08-2009, 11:32 PM
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Quote:
Originally Posted by D O A View Post
I have many + leads (5) coming from an electric fan, water pump, msd etc. going from the front of the car to the rear battery + post. I have been told I need a distribution block or a junction block near the front of the car then one 2 gauge wire going back to the battery. I was told that the way I have the wires ran through the car now will drop voltage over a distance with the gauge wire I am using and may melt the wires or cause a fire.

Does anyone have a picture of one of these installed or what a junction block looks like or what I should use?

Thanks,
Ben SEMPER FI
This is what mine looked like as I was laying it out. Its a Dual Junction block with 3/8 hole eyelets on the wire.

1 of the 4ga going forward is to the starter solenoid (right in the fender). The other is the alternator cable going straight to the batt (on the un-switched side). The 2ga comes from the master on-off switch and gets split at the junction block to my switch panel and starter.

Last edited by Will Evers; 07-08-2009 at 11:36 PM.
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post #9 of 13 Old 07-09-2009, 12:30 AM
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Originally Posted by Will Evers View Post
Have you tried shutting your car down with that kill switch while it was running?
Yup, the first thing I did when I was done was to test it. I have the alt running back to the kill switch as well.

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post #10 of 13 Old 07-09-2009, 07:48 AM
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Yup, the first thing I did when I was done was to test it. I have the alt running back to the kill switch as well.
Good...a major mistake is that people leave the alternator hooked up as normal when it needs to be connected to the unswitched side.

They get f'd when they kill the battery and the alternator keeps the car running.

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post #11 of 13 Old 07-09-2009, 11:07 AM
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Good post DOA! Thanks for the info guys. I was trying to run everything off my starter solenoid and always had a drop in voltage even with the 200amp alt.
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post #12 of 13 Old 07-09-2009, 11:57 AM
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Originally Posted by Will Evers View Post
Good...a major mistake is that people leave the alternator hooked up as normal when it needs to be connected to the unswitched side.

They get f'd when they kill the battery and the alternator keeps the car running.
Absolutely. I made sure to research, and ask someone who knew about this stuff more than me before I even started the relocation.

Here's what my switch looks like. The green wire is 14 gauge, and runs to the alt.

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post #13 of 13 Old 07-09-2009, 12:30 PM
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i had a somewhat similar issue on my car and i use a marine "bussbar"

My needs were inside the car for my gauges / wideband / computer / injector driver etc. I made a bracket that uses the center console studs as a mount. On the bracket is the bussbar, and a relay that is triggered on via the key on power to the radio harness. I used a 10 gauge feed from the starter relay post which is fused. I also ran a ground from the body mount behind the battery to the other side of the bussbar. That gave me protected postive and negative connections nice and neat under the dash.


here is a pic of it

http://www.oldecityit.com/holding/Images/bracket3.jpg

might give ya a idea

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