Topic: How does wiring work???

[old750]

I'm getting frustrated figuring out the wiring on CBR controls I want to use on my bike. I'm testing on lead at a time with voltmeter and all the different possible combinations while turning switches on and off. Sometimes I get a signal when the switches are off, but not on. Can someone help?

[heffay]

if you can snap a picture or two of the controls and what they look like inside it would surely help...

[old750]

All right so I opened the head lamp to see and sure enough there are a bunch of wires not connected to anything. WTF? One is a turn signal. I don't get it. Why do the turn signals still work??? Maybe grounded on the inside? I'm big time confused with this mess.

Ok so I made this diagram of the CBR600 a while ago and posted with no luck. This is the left side wiring. I don't get the circuit thats just always closed. Its a common wire. The A and B are the clutch micro switch I guess.

[05c50]

Don't know if I can help with your problem,but to answer your question "how does wiring work" I had an instructor that stated that eveything electronic worked on the theory of "smoke containment".If you have a short circuit and let all the smoke out,the switch,module,relay,wire,etc will no longer work.
 Sorry, my attempt at being funny.

[Bob Wessner]

It is funny. Reminds me of a prof I had in college. When someone gave him a less than informative answer, he would say, "That answer is like a Moo-Moo, covers everything and touches nothing."

[TwoTired]

This would be a lot easier if you told us which bike wire diagram to use (your bike) and supplied or gave a pointer to a wire diagram for the bike where the controls were taken from.

I understand that your diagram 1 through 12 are the wire color codes for your new controls, right?  What is A and B?  A clutch switch?


So far, I would expect the gray wire to attached to the bike harness gray wire. (pulsed power from signal flasher)
Black should connect to the bike harness black (switched power from key switch.
Blue (to turn signal )
Orange (to Turn signal )
Blue/white (to Front run/marker light)
Orange/white (to Front run/marker light)
White (to headlight low beam)
Blue/white (Maybe to headlight High beam??)
Green white  (maybe horn intent but the 750 controls provide ground not power.  You may have to rewire your horn connections to accommodate new control if it routes power not ground.)  CBR diagram would be helpful.

Not enough info for the other connections, I'm afraid.

cheers,

[old750]

Hey thanks for spelling it out. What is a Front run/marker light? Are the marker lights always supposed to be on until the winker goes on? I'm looking at the Clymer page 196 and it appears so. I think those wires are disconnected under the bucket.

[old750]

This would be a lot easier if you told us which bike wire diagram to use (your bike) and supplied or gave a pointer to a wire diagram for the bike where the controls were taken from.

You may have to rewire your horn connections to accommodate new control if it routes power not ground.)  CBR diagram would be helpful.

By the way I don't have a diagram for the CBR and have not been able to find one for that year. As for the horn, would it work if I grounded the horn switch to the bars and send the other wire to the horn?

[csendker]

Are the marker lights always supposed to be on until the winker goes on?

Typically, the fronts are dual filiment, one on all the time and the other w/the turn signal.  The rear markers are usually single flament, turn signal only. 

[ohiosupersport]

 As for the horn, would it work if I grounded the horn switch to the bars and send the other wire to the horn?


That is what I did. I used the dark green wire from my CBR (f4, i think) switch to the horn, and the light green wire to ground. for the other wires, I did the following:

CBR wire         CB750 wire
black/brown             brown/blue
light blue                 dark blue
2 black wires            not used
orange/white            orange/white
light blue/white         light blue/white
orange                     orange
gray                        gray

The wires that are left are for the headlight, i think. I did this in October and had to wire in a relay for the high/low beam and I don't have my bike back together yet, so I will have to figure it out when I reassemble (hopefully soon). Hopefully this helps a little

[TwoTired]

This would be a lot easier if you told us which bike wire diagram to use (your bike) and supplied or gave a pointer to a wire diagram for the bike where the controls were taken from.

You may have to rewire your horn connections to accommodate new control if it routes power not ground.)  CBR diagram would be helpful.

By the way I don't have a diagram for the CBR and have not been able to find one for that year. As for the horn, would it work if I grounded the horn switch to the bars and send the other wire to the horn?

The horn sounds when 12V is applied to it.  Either, one terminal is grounded and the other gets 12V from the button.  Or, one terminal is always connected to 12V and the other terminal gets ground when the button is pushed.  The Cb750 Wire diagrams I have employ the latter.  I don't know which scheme the CBR used.

Hmm I put CBR wire diagram into google and found this:
http://www.bossturbo.com/cbr/reference_wiring.shtml

Looks like the horn operates with backwards wiring relative to the stock 750.
Also looks like my earlier guesses for wire connections were wrong.

Now, if I only knew what year model bike harness you have, I might be able to make a connection chart.

Cheers,

[old750]

They all looked good to me. Which one is wrong?

The wiring diagram is pretty much the same. I had found a few for other year CBRs but did not trust them since this one is a 2005. I guess it's the same. Thanks everyone.