Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: El__burro on June 09, 2015, 10:35:51 AM
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good morning,
after having "allocated the wiring diagram to the bike i need a few tips on
- wrapping it all.
(I was thinking of heat shrinking tubing but most of them come in small length)
- where exactly is tied to the frame.
(are plastic cable ties any good?)
Thanks
el__burro(http://images.tapatalk-cdn.com/15/06/09/7855a5496033c013786420570de54073.jpg)
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I used heat shrink tubing and self fusing silicone tape from B&Q to wrap up any loose wires on my wiring, for clipping the harness to the frame I bought new Honda clips from DSS.
Cheers
Dennis
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you can buy heat shrink in long lengths (try e-bay, or seen it at some bike events/shows. you will need to also work out the right diameter, and this will get smaller (or larger) depending where you are working from), but it is expensive, I would use some short pieces (10mm) to get the run right, and go over the top with the full run, but you will still have some issues as the wires come out in different directions over the length. Dennis`s idea works.
( E-bay link)
http://www.ebay.co.uk/itm/Black-Heat-Shrink-Tube-Sleeve-Various-Sizes-Lengths-/160809668245?pt=LH_DefaultDomain_3&var=&hash=item257100ce95
Good luck
John
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where about to the frame it needs to be attached?
any pictures would be great.
thanks
el__burro
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brown wire dilemma.
i am in the process of sorting the wires to fit in the heat shrink tube.
the issue is the brown wire (tail light)
it goes from the key switch through the fuse and to tail light, but there is also another one that i am not sure where it should go.
on the K2 wiring diagram is not there but i have found it on K6 (it says NC).
shall i leave it out or to front headlight?
thanks
el__burro(http://images.tapatalk-cdn.com/15/07/04/7f29a0e3431309f44322c9b71809e583.jpg)(http://images.tapatalk-cdn.com/15/07/04/2110ac01ca6619b1c77d7bbecdb9219d.jpg)
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Hi El Burro,
The wiring diagrams you show are non-UK in that the (headlamp bowl) parking lamp is not there.
I can't think what NC stands for, but this connector (in your case) ought to go on up to the headlamp & is that small parking lamp +ve feed.
The attached showing this (front) parking lamp; a CB400F diagram, but good enough.
Cheers,
Simon
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NC probably No Connection for models that don't have the front parking light.
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So I shall move it to the front headlight.
Thanks
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Steve... why can't I figure out such things!
There's me thinking 'Northern Canada'..... and my brain became full-up there....could move no further.
Prob explains why I'm so crap at word games etc!
Yea El Burro... if you're planning on a Parking light option they yup... run the wire all the way up-front.
Simon
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Northern Canada would clearly need the lights on constantly as it is dark for 90% of the year. I've been there and saw loads of mountain bikes but not a single motorcycle.
Not surprising as even as far south as Montreal you'd need skis not wheels between October and April.
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battery cables;
i need to replace both battery cables but i am not sure what to look for.
can i do it myself or better shop around.
1 guess 1 metre would do fine for both red and black.
what capacity do i need?
thanks
el__burro
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(http://images.tapatalk-cdn.com/15/07/30/9a4c621a19a18306c23da5597f7e0e36.jpg)
no rear light, when i push either brake the tail light comes on (even if only the yellow/green is plugged in) strangely also the front pilot light (brown cable) comes on.
not sure what to try next.
i have followed the wiring precisely.
bulbs and wiring all good.
green is hearth?
brown is live?
yellow/green is brake switch.
thanks
el__burro
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Hi El Burro,
Ok. What you need to do is to find the Brown / White that exits the handlebar light switch - and check that it's live (12V) when the handlebar switch is in ANY ON position. This wire then feeds the instrument illumination lamps (are they working correctly?) AND also runs back to the main ignition key switch. (so check all headlamp connectors, frame spine under tank etc)
As just mentioned, when the lights are ON (side / main / high) this Brown / White feeds 12v back to the ignition key switch, which if in the ON position then internally connects it to the BROWN coming out of the ignition key switch.
This BROWN then runs to both the front & back of the bike, to power your tail & park lights.
What's happening (somehow) is that you've wired you're brake switch GREEN / YELLOW to the tail lamp BROWN - which explains why the tail + park light is coming on as well with brake selection.
My guess is the wiring fault might be in the connectors under the back of the seat area / above the mudguard - OR some PO has substituted colours.
No matter... using your multimeter confirm you get 12v out of the YELLOW / GREEN @ brake on (IGN ON obviously) ...... and then connect this wire to either of the two tail light wires that illuminates the 21W brake lamp. ((& yup, it ought to also be a GREEN / YELLOW) (DO NOT connect this GREEN / YELLOW to the GREEN coming from the rear lamp as this should be an Earth.
Next verify that the BROWN is live @ lights switch ON (IGN ON obviously) and connect this to the rear lamp wire which illuminates the 5W tail lamp (& indeed park lamp). Again, be very careful not to connect the BROWN to any GREEN.
Clear as mud eh?
Good luck, it's only spaghetti...
Simon
PS - your prev post, bit late perhaps but I'd be thinking 120A (minimum rating)... try here
http://www.autoelectricsupplies.co.uk/product/751/category/124
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Thanks Lobo,
After checking the brown/white wire and connecting it properly I finally have the rear light coming on ( and no pilot when braking).
The new issue is that the tail light stays on even when i turn the light off.
Other issue are
No speedo light (it could be a dodgy connections as it worked as soon as i swapped wires)
No parking light (i guess they should come on with the key in P2).
I must say that my light switch is a On Off On one.
I have wired it with the black in the middle, blue (high beam) and white (low beam) the the two other sides.
Thanks
El__burro
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Hi again,
Forgive me, a few questions:
1/ is the bike a K6.... in which case (conventionally) the tail lamp + LOW beam came on with IGN (but were temporarily unpowered when the start switch was pressed)
2/ just to confirm, your 'new' (non-standard) handlebar switch has a central feed, and then simply switches power to one of two other wires exiting it? (Your very last sentence is confusing... "... and white low beam the OTHER TWO sides" if this last sentence is correct can you try & explain (with a diag best) how the switch works?
3/ if it is a K6, using your K6 wiring diagram provided earlier, the power feed to the main handlebar light switch should be a BROWN/RED (I think - poor quality) - you're using a BLACK which is perm live with ignition. Won't make a lot of difference other than LOW beam will remain on during cranking & make starting harder etc.
4/ does the engine starter switch have 3 wires going to it, ie a BLACK, WHITE/BROWN, BLACK/RED.
5/ yup, on the K6 (using your drag) the rear lamp should come on @ P2, inc the small front Parking lamp if you've wired it to the BROWN wire which feeds the rear lamp.
If you can answer all of the above I'll try & condense your wiring woes onto a fag-packet sketch to hopefully ascertain where it's all going wrong.
Happy Saturday...hmm.
Simon
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Hi again,
Forgive me, a few questions:
1/ is the bike a K6.... in which case (conventionally) the tail lamp + LOW beam came on with IGN (but were temporarily unpowered when the start switch was pressed)
>>>> the bike is a K2 (diagram below)
2/ just to confirm, your 'new' (non-standard) handlebar switch has a central feed, and then simply switches power to one of two other wires exiting it? (Your very last sentence is confusing... "... and white low beam the OTHER TWO sides" if this last sentence is correct can you try & explain (with a diag best) how the switch works?
>>>>> the switch is an OnOffOn one, it has 6 pins
i have wired the Black in the middle, high beam (blue) to the back terminal and Low beam (white) to the front. the other 3 terminal are not wired.
3/ if it is a K6, using your K6 wiring diagram provided earlier, the power feed to the main handlebar light switch should be a BROWN/RED (I think - poor quality) - you're using a BLACK which is perm live with ignition. Won't make a lot of difference other than LOW beam will remain on during cranking & make starting harder etc.
>>>>> Unless i switch the light on to low beam or high beam, lights are off (apart the tail light)
4/ does the engine starter switch have 3 wires going to it, ie a BLACK, WHITE/BROWN, BLACK/RED.
>>>>> the starter switch button has the red/yellow wire and hearth
5/ yup, on the K6 (using your drag) the rear lamp should come on @ P2, inc the small front Parking lamp if you've wired it to the BROWN wire which feeds the rear lamp.
>>>>> both lamps are wired to the brown one. unfortunately no parking light with P2 yet
If you can answer all of the above I'll try & condense your wiring woes onto a fag-packet sketch to hopefully ascertain where it's all going wrong.
>>>>> hopefully Ive expressed myself properly.
thanks a lot
Happy Saturday...hmm.
>>>> happy sunday.
el__burro
Simon
(http://images.tapatalk-cdn.com/15/08/01/26bfbc23fa20a76c918c006da098022c.jpg)
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Hi again,
Ah, K2... the originally K6 supplied diag confused me.
A couple of points... with the non-OEM lights switch you have, and wired as it is, the rear light will always simply come on with ignition, it has to ... as I think you've connected the BROWN / WHITE to BLACK (as K6 diag shows). The K2 was not originally wired like this, the BROWN / WHITE was supplied 12v via the handlebar lights switch - which you seem to have done away with. No matter...
As you've wired it, the small Park light should come on too with ignition .... it seems there is a break somewhere in this BROWN circuit... the BROWN wire should exit the ignition switch and run to both the front Park light AND the Tail light, so check for continuity, connections, failed bulb and good earth.
Can I assume your IGN key switch is 'standard K2 Honda'?
Is the Brake light circuit working ok now?
In the top diag below is how your bike seems to be wired, and frankly, apart from the dicky Park light is as good as you'll get.... it it is correct and working 'as advertised'.
As you say, in the P2 position the Tail + Park should operate, but NOT the Inst illumination lights. When you say, 'No parking light with P2 yet", do you just mean the front small lamp, or both? Anyways, see the 2nd diagram & check against your bike.
So, your wiring seems about right barring the Park light glitch, but can be improved however, as I THINK your non-standard light switch can be better put to use.
Basically, it is likely a Centre OFF DPDT (double throw, double pole... YAWN) switch, and if so can be wired to only select the Tail / Park / Inst illum lamps at Headlamp ON, ie Low or High.
First though you need to check it is indeed a DPDT... ie get your meter & check... (see 3rd diag)
In Centre / OFF... there is no continuity between any connectors.
In Left position... A & C connect, B & D connect. (But A & B, or C & D, indeed all else remain isolated)
In Right Position A & E connect, B & F connect. (but A & B, or E & F, indeed all else remain isolated)
If all the above hold true, then you can wire this switch to provide 12v to the IGN switch BROWN / WHITE (instead of the BLACK) at Headlight ON.
Basically you'll join A to B, and D to F to BROWN / WHITE, whilst DISconnecting the BLACK to BROWN. This then will enable you to control the Rear / Park light via the Main Light switch as in the 3rd diagram. The P2 position should not be affected & continue to work as Honda intended.
Hope it all makes sense, good luck,
Simon.