No voltage feeding headlight on/off relay

[HPTuner]

I was riding my FJR this afternoon & noticed I had no headlights. After coming home & pouring over previous threads for 3 hours to get an idea of the wiring, I have no voltage on the red/yellow wires feeding the on/off relay. The fuse is good, & I checked on the backside of the fuseblock to make sure the red/yellow wire is hot there, it is. I'm losing fire somewhere between the fuseblock & the connector at the relay. Anybody got any ideas? I'm supposed to leave Thursday morning for a 4 day trip to the mountains, so I need some quick help!

 

[Constant Mesh]

You can open up the left handlebar switch assembly and check for voltage at the high/low beam selector switch. That switch should have voltage whenever the ignition is switched on and the headlight fuse is good.

 

[JamesK]

Can't speak for the GenI, but on my GenII this kind of problem was due to the Hi/Lo relay degrading sufficiently (internal relay contacts) to prevent it from working reliably. On the GenII this relay is located behind Panel B (looking from LHS while sitting on the bike). If you can find where that relay is on the GenI try tapping it with something like the handle of a screw driver to see if it will come to life, at least until next time, but this will confirm the if it's the same problem.

 

[HPTuner]

The hi/low switch & relay is working okay. In my troubleshooting, I had the ignition switched on with the right hand grip kill switch off. While toggeling the hi/low switch back & forth, you could hear the relay clicking. So then I jumpered voltage to the blue/green wire leaving the on/off relay & the headlights worked fine,hi beams & low beams. I think my problem is the loss of fire to the on/off relay. Is there a connector between the fuseblock & on/off relay that could be giving me problems? I don't have a shop manual but I'm getting one! Also, the ecm IS sending the ground signal when it's running.

 

[Constant Mesh]

There is an eleven wire wiring harness disconnect plug connector somewhere under the front nose near the gauge cluster and relays which breaks the headlight power circuit between the on/off relay and the headlight fuse. The circuit between the hi/lo switch and its relay also loops through this eleven wire connector. The on/off relay may be bad.