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Old 10-26-2012, 09:21 PM   #331
tete OP
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Joined: Oct 2009
Location: Gilbert Az
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Ok I got the switch back together properly. But I follow the route and I believe the relay must be wired incorrectly. However I can't seem to find a diagram showing which female end goes to which male end. I wired it up the way it was and it did not work. The PO was obviously in there messing things up because there was electrical tape and messy connections everywhere.

So essentially I need a headlight switch relay diagram. Electrical is very frustrating. Especially when the information is not out there in the same way mechanical issues are.
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Old 10-27-2012, 06:58 AM   #332
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There could be problems if the PO has replaced the LH switch unit. I understand that the later switch units have different wiring, if you can find a wiring diagram for a /7 round about 1977, then this might help. Does your LH switch unit have an on/off function? In the US legislation in the 70s ensured that bikes had to have lights on all the time, but I'm not quite sure when this was enacted. According to my wiring diagram a 74 R90/6 does not have a headlamp relay, though my bike has one fitted. I will go and check the bike and see, either today or tomorrow.

Euro bikes will have an on/off switch, so be careful as to which wiring diagram you are looking at. The function of the headlamp relay is to prevent the full headlamp current running through the headlamp switch.

The earth for the instrument lights runs via the brake fluid low level switch to an earth by the coils, if that is still present then you are OK.

Charles
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Old 10-27-2012, 02:32 PM   #333
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Yeah my instruments light up fine as do my turn signals and brake lamp. Parking light and brights (if i push tht button down that is.) work fine it seems.

Just the "stay on" headlight won't happen or stay on bright wont happen.
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tete screwed with this post 11-03-2012 at 05:06 PM
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Old 10-28-2012, 01:24 AM   #334
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About tires.

Question: With total disregard to handling as I am aware of the characteristics. Do we know if the firestone Deluxe tires will fit the typical size R90/6? I believe 18 x 4.00 and 19 x 3.25 ?
Im concerned with the rear swing arm rubbing and the front fender rubbing - the tires seem to be balloon like.

thanks in advance.
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Old 11-03-2012, 05:04 PM   #335
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Ok, so I have not installed my acewell because of issues I am having with my headlight not working.

I'm still dealing with that.

I got a new headlight switch and a new relay.

Here is the issue. My switch is slightly different.

Pictured in my old on the left and new one on the right. Fits perfect but the switch is different.

Also the wiring is different. Once again the old on the left new one on the right

Anyone deal familiar w this?
Which wires may go where? The new harness does not have a red, grey or solid brown wire?
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Old 11-03-2012, 05:41 PM   #336
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It looks like, according to clymer, my new switch is off a R100. Now I have to figure out a way to mate it to the R90 set up.
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Old 11-03-2012, 05:43 PM   #337
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It looks to me like your old switch is what I hear people calling a European switch, it has an on/off for the headlights. The switch on the right does not have an on/off so the headlights will be wired to stay on all the time.

You can probably figure this out if you look at two separate wiring diagrams that each feature one of these, maybe.

That's what it looks like.
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Old 11-03-2012, 06:54 PM   #338
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Quote:
Originally Posted by disston View Post
It looks to me like your old switch is what I hear people calling a European switch, it has an on/off for the headlights. The switch on the right does not have an on/off so the headlights will be wired to stay on all the time.

You can probably figure this out if you look at two separate wiring diagrams that each feature one of these, maybe.

That's what it looks like.
Yep, You are right now I must figure out how I can wire the new switch in. I actually prefer always on.

Here is what I do know.

White = Brights
Yellow = Low Beam or regular beam
Brown is ground

Brown w White = horn
Green w black stripe= horn

So i need to figure out what the Yellow with White stripe is

Then I need to figure out f I can use my old relay or do I need a different one. Also need to figure out which goes where.

not fun. The best part is when I'm all done figuring this out I'll take it apart for the Acewell. One thing at a time.
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Old 11-04-2012, 01:48 AM   #339
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What can I connect the brown/white stripe wire / as well as the green wire to the switch? looking at this just makes me more confused. Can't i just go back to cleaning carbs and painting stuff.

For the record I have a R90/6 and am trying to retofit the R100 switch to work (this has always on headlight)

OK so here is how I look at it. According to clymer.

I should be able to connect the brown w white striped wire for the horn switch to the clutch switch one on the R90/6

The green/black striped wire I should be able to connect to the contact board.

That should take care of the Horn there is no horn relay on the R90/6 but there is on the R100 that the switch was designed for .

On the headlight side is where it gets tricky/confusing for me. because I have to use the relay. What if I simply match up the left over wires (4 of them) to the relay from the /6? here is the diagram

On the left is the R90/6 and on the right is the R100/7



There is no Red on the new harness but Perhaps I won't need that with the "always on" switch.. i dunno. ungh.
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Old 11-04-2012, 06:33 PM   #340
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Ok so I figured it out. Got to bridge the green over from the ignition. The plan for the horn didn't wrk out so ill just hook it up the same way it was originally. Gotta find those wires.

Ill draw up a diagram once I'm done for any future inmates that may find it useful.
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Old 11-05-2012, 12:53 PM   #341
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Cool. My light won't switch off at all, nor will my ignition. I see a rewire in my future and possibly and acewell..
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Old 11-06-2012, 01:49 AM   #342
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Originally Posted by Kt-88 View Post
Cool. My light won't switch off at all, nor will my ignition. I see a rewire in my future and possibly and acewell..
I can't say I'm all that excited about opening it up again and doing the acewell. But I'm going to. The one problem I have is w the always on headlight when I go to start it the headlight is on. Drawing power. But my bike starts so easily and I live on az so I'm not to concerned for it being on for a milli second.
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Old 11-06-2012, 02:01 AM   #343
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Similar story here, but it's starting to get cold in the mornings and this is my daily ride. Amperage matters a bit more then..
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Old 11-07-2012, 12:36 PM   #344
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Anyone recognize these mirrors?
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Old 11-07-2012, 12:37 PM   #345
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Don't mind the mannequin head. She keeps the birds away. Ha!

I have 4 of these that I found w all my bmw stuff I got w the bike.
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