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Old 05-09-2017, 02:40 PM   #1
rctrooper1
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LS Swap front wiring / junction block

I am in the final stages of my LS Swap on my 70 C10. I will like to do some sort of upgrade and use a junction block. I am looking for ideas and pics as I am more of a see and do kind of guy. I have visited mad electrical site and read their articles but still will like to see how it can be upgraded.

any help is appreciated.
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Old 05-10-2017, 09:30 AM   #2
Jstock85
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Re: LS Swap front wiring / junction block

Can you be more specific? What exactly are you looking to do?
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Old 05-10-2017, 10:10 AM   #3
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Re: LS Swap front wiring / junction block

What I've done in the past on a few LS swaps is run the main battery cable down to the starter. Then a heavy 6 gauge wire from the starter to the stud on the alternator. Then for a good 12 volt source a heavier gauge wire from the alternator to a isolated stud mounted where it best suited for the vehicle. Because I'm a bit paranoid I run an in-line fuse in that wire. I think it's a 40 amp maxi fuse.
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Old 05-10-2017, 10:48 AM   #4
BR3W CITY
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Re: LS Swap front wiring / junction block

My truck has a main fuse block (engine/tran), a body block (under the dash where my original was), and also a main +12v terminal underhood for anything that needs a 12v source.
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Old 05-10-2017, 10:48 AM   #5
Jstock85
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Re: LS Swap front wiring / junction block

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Originally Posted by LS short box View Post
What I've done in the past on a few LS swaps is run the main battery cable down to the starter. Then a heavy 6 gauge wire from the starter to the stud on the alternator. Then for a good 12 volt source a heavier gauge wire from the alternator to a isolated stud mounted where it best suited for the vehicle. Because I'm a bit paranoid I run an in-line fuse in that wire. I think it's a 40 amp maxi fuse.
You fused the wire from the alt to the starter?
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Old 05-10-2017, 11:11 AM   #6
rctrooper1
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Re: LS Swap front wiring / junction block

I am looking to do away with the original splice on the front driver's side and add a junction block. I'm thinking about having the alt power wire run to a junction block. I was wondering what you all have done and if you all can upload pics.

thanks again,

Joe.
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Old 05-10-2017, 11:12 AM   #7
rctrooper1
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Re: LS Swap front wiring / junction block

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My truck has a main fuse block (engine/tran), a body block (under the dash where my original was), and also a main +12v terminal underhood for anything that needs a 12v source.
any pics?
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Old 05-10-2017, 11:16 AM   #8
LS short box
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Re: LS Swap front wiring / junction block

Not the wire from the starter to the alternator. The wire from the stud on the alternator to the isolated stud for 12 volt power I fuse that wire.
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Old 05-10-2017, 11:21 AM   #9
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Re: LS Swap front wiring / junction block

ok I got ya
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Old 05-10-2017, 07:17 PM   #10
BR3W CITY
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Re: LS Swap front wiring / junction block

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any pics?
About 2/3 of the way through my build. I forgot the password to my Photobucket account haha. If I can get logged in I'll post them.
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Old 05-11-2017, 11:12 AM   #11
Tork?
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Re: LS Swap front wiring / junction block

Maybe one of these firewall junction blocks to bring power into the cab?

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Old 05-11-2017, 11:39 AM   #12
rctrooper1
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Re: LS Swap front wiring / junction block

I am thinking of going with two of these. one on the front left side where the old regulator used to be and hook up the alternator wire to it and the other on the firewall passenger side for other accessories.

If any of you have pics, please post them up, looking for ideas.

thanks.
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Old 05-11-2017, 01:00 PM   #13
JJH Jimmy
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Re: LS Swap front wiring / junction block

I used this.


http://www.racetronix.biz/itemdesc.a...JBLOCK-001&Tp=
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Old 05-11-2017, 01:40 PM   #14
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Re: LS Swap front wiring / junction block

I like that Jimmy. Good clean look!
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Old 05-11-2017, 02:56 PM   #15
rctrooper1
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Re: LS Swap front wiring / junction block

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Very nice! thanks!
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Old 05-11-2017, 11:42 PM   #16
BR3W CITY
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Re: LS Swap front wiring / junction block

Mine used to be on the inner fender. Now its the same terminal, but located sideways into the old mounting holes from the inner fender. I don't have a pic of that version atm.
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Old 05-13-2017, 11:27 PM   #17
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Re: LS Swap front wiring / junction block

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Like the clean look, thanks for posting the link!
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Old 05-19-2017, 03:54 PM   #18
68 C10 LSX
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Re: LS Swap front wiring / junction block

I used the under hood fuse/relay box from a 97 Ford explorer. Bought it from the junk yard with relays and fuses still in it and bolted it right in after wiring everything up. I'll snap a pic when I get home and post it. Super easy and makes forgetting which fuse and relay are for what not an issue.
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