help wiring r75/5 with /6 motor.

[Rob Frankham]

holy hanna montana, I would buy you a case of the cheapest beer available for these drawings. hope they work. My relay has one black post but two black wires. I am assuming I will have an open green post and double up the black wire at the connection. Right??

I REALLY don't think that would be a wise move. Both the /5 and the /6 models should only have one black wire to the starter relay (according to the diagrams).

You need to find out where these wires go before connecting them up. The green wires go to switched battery positive so connecting a stray wire to them will send battery volts who knows where. Could be a short and expensive experiment.

Assuming the loom is stock, the wire you want goes to the starter solenoid. If you pull the wire off the back of the solenoid, you will be able to check for continuity and identify the right wire. Where the other one goes is anyones guess... its not impossible that there may be a spare connector in the loom that does absolutely nothing, intended for some aftermarket accesory or it may be connected into some other circuit.

Possibly the best way to do it, if you can't work out where the other end goes, is to wire all those connections you can identify with some certainty, switch it on and see what doesn't work.

Rob

[Boertjie]

To Uncle Rob en Ken, and I know there are a few others..your help to this forum especially in electrical questions are worth gold!
You saved a lot of folks a good sum of $ over here. So from me thank you, may you have lots of returns, even if it's only lots of grand children

[Deleted User 62]

holy hanna montana, I would buy you a case of the cheapest beer available for these drawings. hope they work. My relay has one black post but two black wires. I am assuming I will have an open green post and double up the black wire at the connection. Right??

I REALLY don't think that would be a wise move. Both the /5 and the /6 models should only have one black wire to the starter relay (according to the diagrams).

You need to find out where these wires go before connecting them up. The green wires go to switched battery positive so connecting a stray wire to them will send battery volts who knows where. Could be a short and expensive experiment.

Assuming the loom is stock, the wire you want goes to the starter solenoid. If you pull the wire off the back of the solenoid, you will be able to check for continuity and identify the right wire. Where the other one goes is anyones guess... its not impossible that there may be a spare connector in the loom that does absolutely nothing, intended for some aftermarket accesory or it may be connected into some other circuit.

Possibly the best way to do it, if you can't work out where the other end goes, is to wire all those connections you can identify with some certainty, switch it on and see what doesn't work.

Rob

Isn't there another black wire that goes to one side of the coil?

[Ken in Oklahoma]

Isn't there another black wire that goes to one side of the coil?

Yes, between the points and the low side of the series connected coils.

Rob was addressing black wires connected to the starter relay, and there's only one connected to it.



Ken

[Deleted User 62]

Isn't there another black wire that goes to one side of the coil?

Yes, between the points and the low side of the series connected coils.

Rob was addressing black wires connected to the starter relay, and there's only one connected to it.



Ken

Correct, but chipsdad said he had an extra black wire in there and was looking for a place to connect it. Maybe it's the one from the points?

[Ken in Oklahoma]

Correct, but chipsdad said he had an extra black wire in there and was looking for a place to connect it. Maybe it's the one from the points?

Got it. So chipsdad can now look at his points (or more properly the condenser inside the front engine cover). The points wire (which is encased in a yellowish "spaghetti" insulator) should be connected to one of the two terminals on the condenser. There should then be a black wire connected to the other condenser terminal. That black wire disappears into a harness and the other end should be connected to the low side of the two coils.

So now I think we have both ends or each of the two black wires accounted for.



Ken

[chipsdad]

my points/condenser/coil wire is intact.but.. there is still an extra wire coming from the front motor(black). note the blue and red wires are also there and hooked up.

[Ken in Oklahoma]

my points/condenser/coil wire is intact.but.. there is still an extra wire coming from the front motor(black). note the blue and red wires are also there and hooked up.

Well, so apparently your bike has three black wires when it only came from the factory with two. It would seem then that a black wire has been added by somebody, and if so there's no guessing why and for what. It's simply anybody's guess and all the head scratching in the world isn't likely to be of much help.

Wasn't it Rob who suggested to not worry about that mystery black wire? Just leave it alone and see if there's anything on the bike that doesn't work.

But I'm a bit bothered by your statement that, "there is still an extra wire coming from the front motor (black)". Every electrical function on a motor can be made visible by removing covers. So how come, do you suppose, that you can't see the origin of that third black wire from the motor itself? You can inspect all the electrical functions having to do with the motor; the points, the alternator stator, the diode board, the starter, and the oil pressure sensor. To be sure, at least one wiring harness disappears into the engine, but you know and can see where the wires have to terminate based on the functions I listed.


Ken

[chipsdad]

it is going to the diode board, but I already have the blue going to the diode board.

[Ken in Oklahoma]

it is going to the diode board, but I already have the blue going to the diode board.

That blue wire connecting to the diode board is the D+ function which, among other things, is connected to the battery positive pole (which means always "on"). Your motorcycle only needs the one blue wire connected there. And that particular blue wire probably goes to the socket for your voltage regulator.

That you find a black wire connected there in addition to the blue wire suggests that a previous owner used that terminal as a supply for 12volts for who knows what reason.

The upshot is that black wire doesn't "need" to be connected to anything.

Is there an accessory still on your bike that the previous owner might have fed with the 12 volts, like a plug for a heating vest, or cigarette lighter, or maybe even accessory lights? In any event that would not be the best place to grab the 12 volts. A better place would be the battery positive terminal itself, and then fed through an inline fuse to whatever is desired.



Ken