FrankS 1978 Special

[nj1639]

Reserve Lighting Unit.
The small gray box near the battery.
Some of us remove it from the system by pulling the connector and then putting a small jumper from the blue/black wire to the blue/yellow in the loom connector. Toss the RLU into the mill pond, holler, bin etc.
It’s there to flip your high beam on if you lose your headlamp.
I mention it since you mentioned the blue/yellow wire in that vicinity.
Carry on……

 

[Jim]

So last time out I disconnected all the connectors with brown wires including the ignition switch.

For fuse to blow, there has to be (too much) power running through it. How's that gonna happen with the ign switch disconnected? It can't. If you're gonna chase down a short, it needs power. Leave it (the ignition switch) connected from now on.

Installed all the fuses and everything was fine. I reconnected the connectors one by one listening for a fuse to blow but nothing happened. However when I turned on the ig switch, the brown wire fuse blew.

Reread above. You can't tell if a fuse will blow without power running through it.
You have to have power to look for a short!!
You have to have power to look for a short!!
You have to have power to look for a short!!


Disconnect all the connectors I circled ...again. Notice I DID NOT circle the ign switch. Know why? You have to have power to look for a short!!
Start reconnecting one at a time. Every time you reconnect one, turn the key on and see if the fuse blows. If the fuse doesn't blow, move on to the next connector and repeat the process.... hook up, power up.... see if the fuse blows.

 

[member43148]

Watching, hopefully this short is found soon

 

[FrankS]

Reserve Lighting Unit.
The small gray box near the battery.
Some of us remove it from the system by pulling the connector and then putting a small jumper from the blue/black wire to the blue/yellow in the loom connector. Toss the RLU into the mill pond, holler, bin etc.
It’s there to flip your high beam on if you lose your headlamp.
I mention it since you mentioned the blue/yellow wire in that vicinity.
Carry on……

appreciated!

Hi frank, when you turn on the ignition switch does the red oil/brake light come on and is the green neutral light on?

No lights at all.

 

[jaybar6]

appreciated!

No lights at all.

Hi frank, there is your answer the fuse that is blowing is the lighting circuit. Which is the blue wire coming out of the ignition switch.

 

[FrankS]

Hi frank, there is your answer the fuse that is blowing is the lighting circuit. Which is the blue wire coming out of the ignition switch.

The blue wire is the issue I think because it tested as shorting to ground. But it is the brown wire fuse (signals) that blows.

 

[Jim]

The blue wire is the issue I think because it tested as shorting to ground. But it is the brown wire fuse (signals) that blows.

Follow the blue wire to the closest connector and disconnect it. Brown fuse still blow?

 

[FrankS]

Follow the blue wire to the closest connector and disconnect it. Brown fuse still blow?

Will do so tomorrow.

 

[jaybar6]

The blue wire is the issue I think because it tested as shorting to ground. But it is the brown wire fuse (signals) that blows.

sorry frank, I was wrong the neutral light and the brake light are on the brown wire circuit. according to the 1978 circuit diagrams in the tech section.

 

[jaybar6]

Every other light in the clocks are on the blue wire circuit except the brake and neutral light. shucks! I thought I had it there.

 

[Jan_P]

IT is there

Either Disconnect as Jim Suggest in # 177
or
As Myself In
# 232 # 233

And report what happens .. we take it from there .Rethink looking some more in the Schematic

 

[jaybar6]

Hi frank, If you require a new ignition switch, mikesxs has them at half price, $13. https://www.mikesxs.net/yamaha-xs650-ignition-switch-oem-584-82508-50.html

 

[FrankS]

Nothing done today. Out buying another xs650, 1977 Standard needing attention but the price was right at $1K Cdn.

I realized that yesterday I followed Jim's instructions but in the wrong order. I disconnected all brown wires, put the brown wire fuse back in, - okay so far - but then I reconnected everything and left the ignition connection till last. It should have been connected first, then all the others one at a time until the fuse blew with the troublesome circuit. Duh! Hope to do that later today.

Gotta give the new bike a bit of attention too. Hope it doesn't have a short!

 

[Jim]

It should have been connected first, then all the others one at a time until the fuse blew with the troublesome circuit. Duh! Hope to do that later today.

Yes you got it!!!
....finally.

 

[FrankS]

Yes you got it!!!
....finally.


View attachment 334534

Yes, I deserved that.

 

[jaybar6]

oh no! franks got the xs fever. it is in his blood. these critters will gradually take over, hiding under tarpoline , up in the rafters, down in the basement and even watching you in your living room while watching tv. those honda's in the garage will mysteriously end up dead in the beck at the bottom of your drive, because like the cuckoo they push all the other birds out of the nest. demand all your attention. the greedy bastards.

 

[FrankS]

oh no! franks got the xs fever. it is in his blood. these critters will gradually take over, hiding under tarpoline , up in the rafters, down in the basement and even watching you in your living room while watching tv. those honda's in the garage will mysteriously end up dead in the beck at the bottom of your drive, because like the cuckoo they push all the other birds out of the nest. demand all your attention. the greedy bastards.

Oh no, I'm done.

 

[member43148]

One to keep , One to go .
That worked for years for me.

 

[jaybar6]

Oh no, I'm done.

you'll be alright frank, as long as you didn't put them side by side in the garage... frank you didn't do THAT?! ... they be whispering, conspiring, and plotting all night and day.

 

[jetmechmarty]

One to keep , One to go .
That worked for years for me.

You’re a special case. Congratulations for maintaining your sobriety.