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Power Junction Block near C500 by fierosound
Started on: 06-19-2015 05:40 PM
Replies: 10 (1306 views)
Last post by: fierosound on 06-15-2020 10:45 AM
fierosound
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Report this Post06-19-2015 05:40 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
You can't buy these anymore - at least not at your local auto parts store.
I couldn't even come up with a part number when searching online.

I had some power issues with the fusible links that connect to this and it fell apart when I started to disconnect wiring.
I got lucky and found a non-rusty one in a 1989 Chev Van (battery area) at Pick n Pull for $3.



EDIT: Found GM part number 3996270 (discontinued)


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[This message has been edited by fierosound (edited 06-15-2020).]

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fierosound
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Report this Post06-21-2015 10:00 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
Helpful article on avoiding Electrical Snafus
http://www.hotrod.com/news/...ducts-december-2013/
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fierosound
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Report this Post06-21-2015 10:15 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
Junction Blocks - later GMs used these styles

1-post


5-post



Of course, they've pretty much eliminated these power junction blocks and fusible links,
by using Underhood Fuse/Relay boxes usually located right next to the battery.



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theogre
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Report this Post06-21-2015 11:42 AM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
Many PDF versions of 22P are missing several sections. You need to check a real GM copy.
Even then numbers change or are discontinued.

hotrod link shows parts etc. How does it matter here?

 
quote
Originally posted by fierosound:
Junction Blocks - later GMs used these styles
1-post

...
Of course, they've pretty much eliminated these power junction blocks and fusible links,
by using Underhood Fuse/Relay boxes usually located right next to the battery.

Source for One stud example? Because 1 stud and many ends on it as show above can cause problems. Above Pic looks more like some DIY did that w/ new links. Is a reason Fiero has 2 studs etc. The 5 studs have only 2-3 ends to each stud too. In general, Screw/Stud terminals only get One or Two ends per terminal no matter the size, volt/amp used, etc.

The Ground w/ 1 Bolt (right of relay) in 5 stud is bad too. 7 ends to 1 bolt should be split into 3 - 4 ground close to whatever devise(s).
...
Not quite. Many cars still have Fusible Links and Maxi/Mega and other Fuses under the hood.

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Lou and Blue
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Report this Post06-21-2015 12:34 PM Click Here to See the Profile for Lou and BlueClick Here to Email Lou and BlueSend a Private Message to Lou and BlueEdit/Delete MessageReply w/QuoteDirect Link to This Post
Here ya go !

http://www.gmpartsgiant.com...ock-asm-3996270.html

I just wired my lower ring to the top stud so it's on the same stud as the ring on top. Makes a nice connection and works fine. When I put it on the bottom stud it didnt make contact. I could have made an oblong connector to join the two studs but putting them on the same stud works fine.
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[This message has been edited by Lou and Blue (edited 06-21-2015).]

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fierosound
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Report this Post06-25-2015 11:02 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Lou and Blue:

Here ya go !

http://www.gmpartsgiant.com...ock-asm-3996270.html

I just wired my lower ring to the top stud so it's on the same stud as the ring on top. Makes a nice connection and works fine. When I put it on the bottom stud it didnt make contact. I could have made an oblong connector to join the two studs but putting them on the same stud works fine.


Thanks. Others will benefit from this information.

I was just saying these aren't easy to come by and expensive - for what it is...
Mine "cooked" (water over time got into connections) and I lost all power to the car while driving.
I needed one "today" to fix it - so I got one at the wrecking yard.
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theogre
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Report this Post06-25-2015 12:14 PM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have no problems because I took that apart, clean and coated all part w/ silicon (brake grease or dielectric) then put parts back together.
Did that 15+ years ago along w/ grounds in the engine bay. Gets a bit dirty but silicon keeps water etc from attaching the "box" or ends.

GM made the Box so studs are not connected. The Alt output terminal is + Bus that connects both studs.
If you don't have OE Alt terminal then make a new copper bus and coat w/ silicon.
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fierosound
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Report this Post06-12-2020 11:02 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:



GM part number 3996270 (discontinued)



On eBay...
https://www.ebay.com/itm/GE...GM-NEW-/323763775521

[This message has been edited by fierosound (edited 06-15-2020).]

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montegut
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Report this Post06-12-2020 05:44 PM Click Here to See the Profile for montegutClick Here to Email montegutSend a Private Message to montegutEdit/Delete MessageReply w/QuoteDirect Link to This Post
I think Rodney sells these.
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olejoedad
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Report this Post06-13-2020 08:29 AM Click Here to See the Profile for olejoedadClick Here to Email olejoedadSend a Private Message to olejoedadEdit/Delete MessageReply w/QuoteDirect Link to This Post
JEGS and Summit have them in stock.

S-10 pickups and Blazers used the same part.
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fierosound
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Report this Post06-15-2020 10:45 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by olejoedad:

JEGS and Summit have them in stock.

S-10 pickups and Blazers used the same part.


Yup... Jegs has a nice reproduction part.
Couldn't find anything at Summit.

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