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Power & Energy
Forum Crimp-on connectors, the problem from the start. Need a better solution
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Forum Thread Details
  • State Not Answered
  • Replies 1 reply
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  • dc-dc
  • signal
  • management
  • controller
  • digital
  • linear
  • power_distribution
  • Design
  • power_supply
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Related

Crimp-on connectors, the problem from the start. Need a better solution

Catwell
Catwell over 15 years ago
For better or worse, I've used crimp on connectors, at some point, for everything from power to digital signals. But often enough the wire pulls out a little from the connectors cause intermittent or no connections. I couldn't even count the number of times I've found, in my own as well as other people's designs, being the cause of some malfunction. Even when I use various crimping techniques, the wire tends to pull out. So, I know this may be over doing it, but I crimp and then solder each connection.

The ease and functionality of having a ring, fork, or plug end is necessary, but is there a quicker more reliable way to get these sort of end connectors, on the cheap side? Or perhaps a quicker way of securing the connection on regular crimp-ons?

Let me explain an example of where I use these and the environment they have to withstand. I am rebuilding an old motorcycle, and in particular the wiring. I've constructed my own harness, and I use a lot of crimp on pin & plug combinations. In the past I would just crimp, but as I am riding the vibration loosened many connectors making the bike malfunction. Once, I spent a weekend trying to find what part of the engine electronics failed just to realize it was my own harness. Now, I solder each crimp to the wire. I find that this is lengthy process. (Crimp, solder, heatshrink tube, continuity test for each one.) the same goes for other electrical wiring, like control panels, etc.

Is there any other options? (And besides screw down and euro style terminals?)

In case anyone wants to know; I'm rebuilding a 1978 Honda CB750.

Cabe
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  • Former Member
    0 Former Member over 15 years ago

    For connections that really matter, I do exactly the same as you do -- especially in a high-vibration environment.

     

    Peace of mind is sometimes worth the hassle.

     

    Apart from that, correct sizing of the wire and insulation to the terminal is important.

     

    Equally important, is to use the correct crimping tool.

     

    And, at some point near the connection is some sort of strain-relief.

     

    Sorry, no magic fix.

     

    (for automotive applications, I've used 'trailer-style' rubber encased connectors which come pre-terminated with about 6" of wire.  They come in 4, 6, ..circuits)

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