Author Topic: I lost my Bike Bible. Help me out with an answer. CB750F3 electrical  (Read 1335 times)

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Offline Frankencake

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White glass cloth covered wire coming from the alternator side of the engine with a ring terminal, independent of the main connector.  Where does it go and what does it do?  I have all of the other wires sorted out but I don't have this one down.  Save me from taking the works apart and searching it out.  It is power for the field coil?  Bike is not charging so I suspect that it goes to the field coil.
Any takers?  TT?  Bueller? 
"Sure, if you don't want that bike in your backyard, I guess I'll take it."  "I'll probably just scrap it......"

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Offline scondon

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Re: I lost my Bike Bible. Help me out with an answer. CB750F3 electrical
« Reply #1 on: July 28, 2009, 02:34:30 PM »
It should route underneath the engine and go to your neutral switch, just under the frame rail. There is a retaining clip mounted on one of the oil pan mounting bolts to take up the slack in the wire.
Give me..a frame to build a bike on, and my imagination will build upon that frame

Offline mcpuffett

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Re: I lost my Bike Bible. Help me out with an answer. CB750F3 electrical
« Reply #2 on: July 29, 2009, 03:30:59 PM »
Or it could go to your oil pressure warning switch if its blue?
Honda CB750 KO 1970,   Honda VTX 1300 2006, Lancaster England.

Offline Frankencake

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Re: I lost my Bike Bible. Help me out with an answer. CB750F3 electrical
« Reply #3 on: July 29, 2009, 04:58:37 PM »
I got it.  It is the neutral switch wire.  I guess that I routed it up instead of down.  So much is forgotten after taking it apart last year.  I figured out my charging problem.  I canned the stock wiring harness and made my own from a surplus one I had around and I actualy kept the color code correct for the next time I go at it.  The problem was that I didn't ground the field coil or the rectifier since I assumed that the rectifier unit was self grounding.  My bad.  A short length of green and a few connectors and she's charging.  
I don't have a neutral light so I don't need that wire.  I tucked it out of the way for future use.  I don't have an oil light either, right now.  (I have pressure folks. Don't worry!)  
I started her for the first time yesterday.  It was music to my ears with that *hollowed out stock exhaust.  The high temp paint cooked off of the headers a bit and commenced to rust with the tropical weather we have in Vermont this year.  I think that header wrap is in order.  It will look much better in the long run.
Thanks for your quick answers.--------------SS



(*read: rotted)
"Sure, if you don't want that bike in your backyard, I guess I'll take it."  "I'll probably just scrap it......"

Frankencake:  Brotherhood of the unemployed?  What's our secret handshake?

333:  Think "Shakeweight".