Battery to PDC connection pic request - JeepForum.com

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post #1 of 15 Old 06-07-2017, 11:54 PM Thread Starter
chicalibro3
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Battery to PDC connection pic request

I was hoping you fine Jeepers had pics of the connection you used when you upgraded wire size. I've installed a 136 amp alternator and I have 2 ga. wire but I'm at a loss at how to connect the battery to the PDC with this bigger wire.
Do I even need to upgrade this wire?


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post #2 of 15 Old 06-08-2017, 11:35 AM
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Quote:
Originally Posted by chicalibro3 View Post
I was hoping you fine Jeepers had pics of the connection you used when you upgraded wire size. I've installed a 136 amp alternator and I have 2 ga. wire but I'm at a loss at how to connect the battery to the PDC with this bigger wire.
Do I even need to upgrade this wire?
I cut and capped off the wire leading to pdc from alternator and wired in new cable to 150 amp fuse mounted to firewall above battery, then on to battery itself. Wire that used to send current from pdc to battery now powers pdc from battery.

Be sure to upgrade grounds also, google big 3 ground upgrade I think....
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post #3 of 15 Old 06-08-2017, 11:40 AM
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Originally Posted by flcracker View Post
I cut and capped off the wire leading to pdc from alternator and wired in new cable to 150 amp fuse mounted to firewall above battery, then on to battery itself. Wire that used to send current from pdc to battery now powers pdc from battery.

Be sure to upgrade grounds also, google big 3 ground upgrade I think....
I also did this after my pdc burned up for the alt to battery fuses, no issues going from alt to battery.

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post #4 of 15 Old 06-08-2017, 12:55 PM
Que89YJ
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Quote:
Originally Posted by chicalibro3 View Post
I was hoping you fine Jeepers had pics of the connection you used when you upgraded wire size. I've installed a 136 amp alternator and I have 2 ga. wire but I'm at a loss at how to connect the battery to the PDC with this bigger wire.
Do I even need to upgrade this wire?
If you're planning on using more power them yes you need to upgrade. If not are leaving it stock them leave the wires stock.

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post #5 of 15 Old 06-08-2017, 01:00 PM
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For reference, on the ZJ (which got 136A and 150A from the factory), they only used 8 gauge wire for that line. Even 4awg is overkill.


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post #6 of 15 Old 06-08-2017, 04:36 PM
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I did the same as FLcracker on my last 3 builds...

I use premade kits (lazy) from this guy. they are great and very flexible wire....

https://ceautoelectricsupply.com/car...-upgrade-kits/
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post #7 of 15 Old 06-09-2017, 11:21 PM Thread Starter
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Thank you very much everyone for the replies. I got the big three wires all in already but I can't wrap my big head around how to feed the PDC. I have 2ga. cable at the alt to battery positive, battery pos. to starter, battery neg. to body and battery neg. to block.

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post #8 of 15 Old 06-10-2017, 11:13 AM
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Adding the new, bigger fused or breaker guarded power wire from alternator to battery eliminates the feed thriugh the PDC.

The original wire than ran from the PDC to the battery is the wire that now powers the PDC due to elimnating the feed from alternator to PDC.

Your simply changing the circuit where the power runs from the alternator. Instead of the alternator powering the PDC, you've changed that feed from the alternator to battery, the juice then runs from battery to PDC.

Well this is how i have it. Havent burned down yet. Same setup as above, instead i used a circuit breaker hidden under the battery tray.
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post #9 of 15 Old 06-10-2017, 11:57 AM
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This ^^^

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post #10 of 15 Old 06-10-2017, 04:53 PM
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Whoa... just read my post lol..

I hope the original poster can understand it with all those typos. Between some hot weather, the 8.8 tear down and a few brewskies on little sleep - i developed some fat thumbs lol.

OP: that clear?
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post #11 of 15 Old 06-10-2017, 07:49 PM Thread Starter
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Yeah got it thank you. I always saw it as the battery feeding the PDC not the other way around.

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post #12 of 15 Old 06-10-2017, 08:05 PM
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Quote:
Originally Posted by chicalibro3 View Post
Yeah got it thank you. I always saw it as the battery feeding the PDC not the other way around.
Remove the old Alternator to PDC feed and leave the Battery to PDC feed.

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post #13 of 15 Old 06-10-2017, 08:55 PM Thread Starter
chicalibro3
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Did you reuse the OEM cable? I brought up this thread because I know that the cable going to the PDC from the battery has that double bolt lug at the PDC so I wanted to see what people were doing with that.

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post #14 of 15 Old 06-10-2017, 09:00 PM
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post #15 of 15 Old 06-11-2017, 08:04 PM
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Quote:
Originally Posted by chicalibro3 View Post
Yeah got it thank you. I always saw it as the battery feeding the PDC not the other way around.
Its actually better to have the feed going to the battery first. The battery acts like a huge filter cap on the alternator output. If you look at it on a scope you would see the ripple the rectifier diodes didn't get rid of. The more power you move the worse it gets. By putting it to the battery first you reduce the ripple.

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