Author Topic: Newbie wiring harness question  (Read 945 times)

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Offline David

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Newbie wiring harness question
« on: July 08, 2008, 06:32:25 PM »
I have a CB750 K4 project bike.  I know that I need to disconnect a number of the wiring connections.  There are several wires that are broken.  They seem to be a spade type connection that is covered by a piece of "clear" insulation.  The insulation is discolored and I can't see the connector inside.  My question is how to separate the wires.  I tried gently pulling on the connection but it felt like I would break the wires before the connector separated.  Can anyone tell me how to get these connectors apart?  I have searched quite a bit but I can't find any threads that talk about this.  Advise will be greatly appreciated.  Thanks,

David
74 CB750

martino1972

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Re: Newbie wiring harness question
« Reply #1 on: July 08, 2008, 06:51:18 PM »
if the clear plastic covering got old and stiff you can try by carefully heating them up abit....
that will make the plastic softer and easier to work with,if they still break with a gentle pull then it would be wise to replace the connectors anyway..

Offline fastbroshi

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Re: Newbie wiring harness question
« Reply #2 on: July 08, 2008, 06:52:53 PM »
  Just grab as close as you can to the separation between the wires, on their plastic protective sleeves.  If their really dirty, they probably do feel pretty wedged in there.  Others will tell you to use electrical contact cleaner, but I redid my harness using alcohol and a real fine dremel "bush".  Couple of good things about the alcohol: 1.  gets everything moist and ready to wipe off.  2.  Any extra just evaporates.

Quote
I know that I need to disconnect a number of the wiring connections.

Eh, it's probably about 30 years old, might as well do 'em all.  Besides, you'll learn the harness faster that way.

For brand new connectors, you can't beat these for look and originality.
http://www.vintageconnections.com/
« Last Edit: July 08, 2008, 06:56:43 PM by fastbroshi »
Just call me Timmaaaaay!!!

Offline David

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Re: Newbie wiring harness question
« Reply #3 on: July 08, 2008, 06:58:10 PM »
Thanks for the advise.  If any of them break, is it best to replace with a bullet type connector?
74 CB750

Offline fastbroshi

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Re: Newbie wiring harness question
« Reply #4 on: July 11, 2008, 07:59:01 PM »
  If the looks and originality are important to you, yeah.  But connectors from autozone or your local parts store do the job.  I have to say, the stock ones are a bit more secure than parts store bits.  You just have to ask yourself how much you want to spend, $5-10 or $75 plus waiting for new ones to ship.
« Last Edit: July 11, 2008, 08:35:43 PM by fastbroshi »
Just call me Timmaaaaay!!!

Offline eastoak

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Re: Newbie wiring harness question
« Reply #5 on: July 11, 2008, 08:21:08 PM »
I have a CB750 K4 project bike.  I know that I need to disconnect a number of the wiring connections.  There are several wires that are broken.  They seem to be a spade type connection that is covered by a piece of "clear" insulation.  The insulation is discolored and I can't see the connector inside.  My question is how to separate the wires.  I tried gently pulling on the connection but it felt like I would break the wires before the connector separated.  Can anyone tell me how to get these connectors apart?  I have searched quite a bit but I can't find any threads that talk about this.  Advise will be greatly appreciated.  Thanks,

David




i just bought a new wiring harness for my '75 k5 and it looks just like the OEM one i pulled off except it's not brittle and dusty. not too expensive either, i saw some harnesses on ebay with a $200 asking price i don't know what makes them so valuable. anyway this one is a pretty good deal.

https://www.partsnmore.com/cat_index.php?model=cb750_sohc&category=electrical