Another Wiring Question

First, thank to everyone here who gave very helpful solutions to my original wiring questions.
I did manage to get everything sorted out, but a new issue has popped up!
Now, when I turn on on headlight, it works!
But when I push the top left button (73 850) which for years has been my high beam button, now the highbeam will not come on,
but even more interestingly, I lose power to the rear tail light, to the headlight, and the bike starts slowing down fast.
Any ideas in advance of me lifting the tank and trying to trace that wire from the headlamp shell back?

highdesert said:

First, thank to everyone here who gave very helpful solutions to my original wiring questions.
I did manage to get everything sorted out, but a new issue has popped up!
Now, when I turn on on headlight, it works!
But when I push the top left button (73 850) which for years has been my high beam button, now the highbeam will not come on,
but even more interestingly, I lose power to the rear tail light, to the headlight, and the bike starts slowing down fast.
Any ideas in advance of me lifting the tank and trying to trace that wire from the headlamp shell back?

Click to expand...

This is confusing from your previous posts I think that the switch clusters have been swapped over which is done by some owners to suit. So it is hard to say what to check but assuming your left cluster is an original right cluster then the high beam 'flash' button is all internally connected so no wires to trace back. Not sure if this helps. To be sure remind me if there is a red push button on the original cluster you have.

Yes, I think I must have switched the clusters years ago when I put on a Magura master cylinder and lever for the front brake from Stan at rockypoint,
I just took my left hand cluster off and looked at it, and yes it is all original connections there.
I am using the top for high flasher, the middle is not connected but is a two position toggle and the bottom I am using for the horn.
I have no kill button because there is no electrical controls on the right side other than the rear tail light activation with the brake lever.
So, I must have the high beam flasher wire under tank maybe mashed against something which causes this power drain now when I depress it.
It was working fine until I rewired the rear and boyer power box, and put on a new head to frame ground. Now, I don't know.
Not a big deal as I hardly ever ride anyway when dark, still it would be nice to figure out what happened.

plj850 said:

I think that the switch clusters have been swapped over

Click to expand...

From previous discussions it is apparent that from early-on, the US dealers would often swap the switch units over, and the headlamp flash/dip switch/horn unit on the left side is how it is shown in the '73 750/850 riders manual control layout drawing.

highdesert said:

I am using the top for high flasher, the middle is not connected but is a two position toggle and the bottom I am using for the horn.

Click to expand...

The toggle switch is for selecting either low (dip) or high (main) beam, so if your headlamp is now working, then the toggle switch should be connected?

highdesert said:

Yes, I think I must have switched the clusters years ago when I put on a Magura master cylinder and lever for the front brake from Stan at rockypoint,
I just took my left hand cluster off and looked at it, and yes it is all original connections there.
I am using the top for high flasher, the middle is not connected but is a two position toggle and the bottom I am using for the horn.
I have no kill button because there is no electrical controls on the right side other than the rear tail light activation with the brake lever.
So, I must have the high beam flasher wire under tank maybe mashed against something which causes this power drain now when I depress it.
It was working fine wired the rear and boyer power box, and put on a new head to frame ground. Now, I don't know.
Not a big deal as I hardly ever ride anyway when dark, still it would be nice to figure out what happened.

Click to expand...

There is no high beam flasher wiring as such, the push button connects insidethe switch cluster. To this cluster there are 5 wires, Blue which 'supplies power' to the Headlamp both dip and high which is selected via the 2 position toggle switch you mention.There is a White wire which 'supplies power' to the 2 push buttons one for the horn and one for the high beam 'flash'. One wire goes to the horn (Purple/Black).
The other 2 wires are Blue/White to main beam and Blue/Red to low beam. Considering you have wiring that is a long way from standard. I would track the Blue/White wire and confirm what it is connected to if anything. If it is not connected and you have lights (Somehow!) then check the end is insulated. If it is connected it may connect into the headlap harness and the colours should match. So track through into the headlamp shell.Let us know what you find....

Here is a quick diagram to check