Connectors to lock into battery and accessory terminals in the fuse box in my 1970 S

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Old Sep 12, 2025 | 08:15 AM
  #1  
olds 307 and 403's Avatar
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From: Melville, Saskatchewan
Connectors to lock into battery and accessory terminals in the fuse box in my 1970 S

I am using the battery and key on running terminal in my fuse box for the various things including powering my HEI. I have had the key on power just pop off twice. I am looking for the factory lock in style terminals to keep it from jumping out. I may even have some. A pic would be handy and a source for the clip in style connector. Thanks
Old Sep 12, 2025 | 08:41 AM
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fleming442's Avatar
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There are Packard 56 terminals throughout the car. They're an advanced spade terminal design. I think the fuse box terminals may use a different, keyed housing. Otherwise, a 1/4" female spade connector should work. Got a pic?
Old Sep 12, 2025 | 08:44 AM
  #3  
olds 307 and 403's Avatar
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Yes, using a spade, keeps popping off. I may have cruise connector, should be right.
Old Sep 12, 2025 | 08:55 AM
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I poked around a bit, and the only keyed units I could find are HEI terminals

You can also tighten female spades by mashing them slightly with pliers where they slide on the blade.
Old Sep 12, 2025 | 10:03 AM
  #5  
olds 307 and 403's Avatar
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Yeah I did that already, probably because I have multiple wires connected to it. I will look around this weekend, may have one from a late 70's cruise harness. I would really like a factory locking connector.
Old Sep 12, 2025 | 01:15 PM
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Do it right, replace the resistance wire with the proper 14 gauge regular wire.

Carefully pull apart the firewall bulkhead connector. You will probably need a heat gun to soften the factory glue/sealer GM used to environmentally seal the connector. Remove the male 56 series terminal, install a new male 56 series terminal with a length a 14 gauge wire, reassemble the firewall connector.

Problem solved.
Old Sep 12, 2025 | 05:57 PM
  #7  
olds 307 and 403's Avatar
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From: Melville, Saskatchewan
Yeah, I could do that. I actually just bought an auxiliary fuse box with 12 fuses and 4 relays. I may send the Terminator X Max back to Holley and run everything off the auxiliary box. Still a few issues electrically. I should bought the auxiliary box to begin with the EFI.
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