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Does anyone happen to know what series of terminals are used in the Underhood Electrical Center? It appears there are three different varieties used.

I am wanting to repurpose one for use in an LS swap, and would rather crimp new wires than splice pigtails.
 

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Does anyone happen to know what series of terminals are used in the Underhood Electrical Center? It appears there are three different varieties used.

I am wanting to repurpose one for use in an LS swap, and would rather crimp new wires than splice pigtails.
They're Metri-Pack 280 series for the mini fuses and relays and Metri-Pack 800 series for the Maxi-Fuses. I don't believe my UEC had any other terminals (besides the big brass stud from the battery) - this is on a 1996 Roadmaster Wagon.

It might be worth saving some of the original "bus" terminals and either splice (I know...) or un-crimp/re-crimp your wire on. These terminals have a wide strip with 2, 3, 4 terminals in a row with the proper spacing and one wire crimped on the end. This allows clean wiring from a single power or ground source to multiple fuses or relays. I redid a bunch of stuff on mine, added the 2nd relay for 2nd electric fan, repurposed a couple other relays as well as the fuses, etc.

Another option is to just build your own rather than fighting through a re-purpose. A bare box is at most $25 for a 72 position one and it's sealed. They have 12, 24 and 48 position ones too. You need to buy the terminals anyway, the box is cheap and is (can be if you use wire seals) waterproof unlike the OEM underhood ones. GEP uses the same terminals as GM. Littlefuse do not use the same terminals. They accept the same 280 series relays/fuses, but do not use the same female terminals (been there, done that, have a bunch of GT series terminals for the newer GM connectors :)).

https://www.waytekwire.com/products?pSearch=GEP&mfg=27&pageSize=36

Metripack series commonly used on these 90's GM vehicles - https://fixuntilbroke.files.wordpress.com/2019/09/metri-pack-series-section.pdf

Newer GT series terminals used on the newer GM vehicles - https://fixuntilbroke.files.wordpress.com/2019/09/delphi-gt-seires-section.pdf

From the above documents, you should be able to find part numbers and order from wherever you choose - Mouser, DigiKey, Allied, Waytek, Del City, etc...
 

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When i was doing mine, the odd ball extended length ones i had difficulty finding at all the regular sources.
Ended up paying too much for GM pieces.

The bussbar ones, if they are 100%, you can usually crimp on one of the unused areas.
As in a 4 terminal buss bar type will have one crimped, three unused.

EDIT !!!!! Those GM terminals with the alignment flags may have been be for my inside fuse panel.
I will have to check. Sorry for any confusion if they are not underhood
 

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Because i wanted to break up my left amd right injectors, coils , i needed a couple more fuses than my original box had positions.
A 6 terminal metripac 280 female plug makes a perfect 3 min fuse holder.
There is even a cover and mounting tree available
Hope this helps
 

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Discussion Starter #6
After taking the fuse box apart and searching through the Mouser and Aptiv (Delphi) websites, I believe the terminals are unsealed Metri-Pack 280 and Metri-Pack 800 series. The MINI fuses and relays use the MP280, while the MAXI fuses use the MP800.

The MP280 seem to be a terminal used by many of the GM and aftermarket panels that use the MINI fuses.

I haven't been able to find any MP280 still attached in bussbar form. Not sure if I'll re-use the OE bussbars or just go to individual terminals since my combinations of constant/start/run/acc power will vary from the B-Body's.
 
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