No headlights... not the sub harness... ECU?!?!

[Brick]

I replaced the sub harness myself. It was relatively easy.


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[Don in Lodi]

Mine too. The dealership wouldn't do it without the whole bike, I had the headlight out anyway...
Zepfan, did the harness get done?

 

[Zepfan]

No to harness.
I neglected to mention that being the starting point seeing that it's under warranty. ??

 

[Zepfan]

The harness was replaced a few years ago with a valve adjustment. Didn't remember but dealer has on record.

 

[Zepfan]

Turned out to be a simple bad connection in the harness connector (plug).
Light blue to dark blue was burnt and some what melted in plug. Un plugged and re inserted and lights came on!
I think these are to the relay.

Fixed the problem for now but why these connection points became compromised inside of the plug ( and burnt a little) is a mystery.

 

[Checkswrecks]

Not really a mystery, hot pins are a result of either crimping or corrosion.

 

[HoebSTer]

About Bricks old issue. Good job it was resolved with an ECU. I am working on a guys 2012 bike doing the same thing...both headlights went out. Replaced the relay, nothing. Have power at fuse and 2 points on relay. I hook to - bat terminal and touch the yellow side of relay and lights came on. I am thinking bad ground someplace like ECU after reading all this. Bike has almost 80k miles on it and the recall harness was done yrs ago. It would be interesting to swap ECU out w another bike to see.

Jeff

 

[HoebSTer]

Another bad ecu.

 

[Don in Lodi]

Another bad ecu.

Damn.

 

[RonH]

If it was me I would simply supply a ground, or whatever is necessary, to turn the headlights on all the time. Only negative I can see is headlights will be lit during cranking.

 

[TenereTim13]

HeadLights just went out today on my 2013.Does anyone know were I can get a wiring diagram on line? Wish I had some idea what to do.Have a friend coming over to take a look.Calling Yamaha Monday to check for recalls.

 

[eemsreno]

Try hooking a jumper wire from the black wire at the bulb to the frame [run a jumper ground]

 

[TenereTim13]

Try hooking a jumper wire from the black wire at the bulb to the frame [run a jumper ground]

Thanks eemsreno
Tim

 

[TenereTim13]

We took a bulb out and it looks like it's blown.Tested by putting a new bulb in showing no power to the bulb.Unable to locate headlight relay watching YouTube.

 

[veets]

FYI Bike must be running for the headlights to come on.

 

[TenereTim13]

FYI Bike must be running for the headlights to come on.

Thanks veets,
Read that will be trying it tomorrow

 

[TenereTim13]

Got lucky 2 blown bulbs was my problem.Thanks for the help eemsreno & veets Have one more question. Took headlight assembly out unplugged it then repelugged bike won't start.Tested battery plenty of juice too start bike.Had to give it a lot of throttle to start.Seems fine idles and runs.Did just unplugging the headlight assembly cause this?

 

[Brick]

Got lucky 2 blown bulbs was my problem.Thanks for the help eemsreno & veets Have one more question. Took headlight assembly out unplugged it then repelugged bike won't start.Tested battery plenty of juice too start bike.Had to give it a lot of throttle to start.Seems fine idles and runs.Did just unplugging the headlight assembly cause this?

If you turned the key on and off a few times trying to get the headlights working.... without having the kill switch in the off position each time you turned the key on the electric fuel pump tried to cram more fuel in.
You will need to wait a while then try the hard starting procedure.
Kill switch off
Turn the key on
Full throttle
Now hit the starter button.
It may crank a bit but should start. Do NOT twist the throttle during this process.

From now on always turn the kill switch off that way your now overly priming the injectors every time you turn the key on.

Brick


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[TenereTim13]

Thanks Brick,
Hope I didn't hurt anything! Bikes seems to run fine .But will put this in my notes For future references

 

[HeliMark]

Thanks Brick,
Hope I didn't hurt anything! Bikes seems to run fine .But will put this in my notes For future references

You just flooded the engine. Nothing to worry about, other then getting it started, which you did.

No harm, no foul.