Do you use a special crimper for these?
Below is my collection of crimpers:
The crimpers on the left were the first I used. I found them online for $30. They are ratcheting and they have a cool feature that requires you to fully crimp the terminals before the ratchet mechanism will release allowing you to open them again. This ensures you fully crimp the terminals for a good connection. The jaws have dies that can be changed for different types of terminals. In addition to the dies for the Packard 56 terminals (essentially open barrel terminals) I have a set of dies for the regular terminals you buy at the parts store with the insulation on them.
The ratcheting crimpers worked okay for the female terminals. The dies have 2 stages so that it crimps the terminal to the wire core and insulation at the same time (more on that later). However these crimpers cannot do the male terminals, they won't even fit in the dies. And sometimes I found the successful crimps to be a little loose. I would say these crimpers work best on the regular parts store terminals.
After some further Internet searching I found the second set of crimpers (going from left to right). These are available on Amazon or from a Matco Tools truck for about $35. I found several people that had used them for the Packard 56 terminals so I thought they would work for the males since they have 5 different size options. Unfortunately they did not work. Again worked great for female, but not male terminals.
A co-worker had the 3rd set of crimpers with the orange handles. He had gotten them with a terminal kit for Honda motorcycles a few decades ago. These actually were able to crimp the male terminals. However I couldn't find them to purchase anywhere. Additionally it takes a lot of pressure to crimp the male terminals so much so I was afraid the crimpers might break - not good considering they're not mine.
Finally I found a posting about the pair of crimpers on the right. These are actually made by Delphi purchased through American Autowire. American Autowire makes wiring harnesses for hotrods. They sell the crimpers so you can make necessary changes to some of their universal harnesses. Unfortunately these are $90 crimpers. However they are very high quality and work great. If I'd known this was going to be the price to use the Packard 56 terminals in the beginning I probably would have tried to figure out something different. This was one of those "live and learn" moments.
On to the function, the images below show the openings in the crimper. You can see one side looks like butt cheeks. This part curls the open barrel of the terminal back into the wire to crimp it.
First thing to do is to strip about 3/16" of insulation. You can see where the first crimp will capture the bare wire and the second crimp will capture the insulation.
Now the wire is crimped. You can see the curl much more pronounced in the female terminals. The male terminals fold over more than curl.
Then you crimp around the insulation.
The little tabs sticking out at the end of the male terminals help keep them aligned in the housing. The female don't need them.
The other benefit to having all of this stuff is that I was able to wire up my own relay bases. This makes for much cleaner relay installations.
So in the picture above the labels are on the relay bases. These are permanently affixed to the truck and the relays themselves just plug into the bases.
Aside from the cost of the crimpers, it is pretty inexpensive to get all of the components.
- Relay bases are 68 cents each
- Female terminals for the relays are 20 cents each
- Female terminals for the Packard 56 plugs are 18 cents each
- Males are 16 cents each
- Housing for a single female terminal is 12 cents
- Housing for a single male terminal is 17 cents
- Housing for 6 female terminals is 43 cents
- Housing for 6 male terminals is 37 cents
For example you could put together a 4 terminal plug complete for both sides, male and female, to plug together for $2.11.
As I mentioned, I was also able to use these terminals to modify existing factory wiring. So all in all I think it was a pretty good investment. Just wish I hadn't wasted so much on the wrong crimpers.
You do have to buy in bulk but still spending less than $10 on an item. And now that I have them, I use them a lot.