rtwpaul
Member
I decided against chopping the wire harness just yet and do some wire/ connector testing first
What I did was test the neg. at the connector with the battery key off to get me 13.4 V so I know the connector ground is good
I then tested all of these 13 wires in four different ways at the relay (with it connected)
What I was looking for (hopefully) was a very low voltage or 0, then above 221f when running or off but with the ignition on (cause the fan runs when the bike is on if the heat is over 221f) at least 12 V or more, the chart shows what I found...zero matches
The ones with the * I was hoping would switch from low to high...nope, except blue/ red and that's the fuel pump
So I'm going to surmise from this list that I can't control the fan tapping into one of these because none of them goes from low voltage to high voltage, so they must be a power r for the thermosensor, and that acts as the switch/ trigger for the fan once the temp reaches 221f+
Would you agree with my thinking or am I headed in the wrong direction? Cause next up is removing the fuel rail (again) and tapping into the thermosensor leads?
After this, I'm completely dumbfounded, and it looks like Yamaha is too, cause they suggest 'change ECM' (I think I would add a manual fan switch before I did this)
...and a little more additional info, my ECM is flashed, and I have tried it in 'S' and T mode it does the same thing
What I did was test the neg. at the connector with the battery key off to get me 13.4 V so I know the connector ground is good
I then tested all of these 13 wires in four different ways at the relay (with it connected)
What I was looking for (hopefully) was a very low voltage or 0, then above 221f when running or off but with the ignition on (cause the fan runs when the bike is on if the heat is over 221f) at least 12 V or more, the chart shows what I found...zero matches
The ones with the * I was hoping would switch from low to high...nope, except blue/ red and that's the fuel pump
So I'm going to surmise from this list that I can't control the fan tapping into one of these because none of them goes from low voltage to high voltage, so they must be a power r for the thermosensor, and that acts as the switch/ trigger for the fan once the temp reaches 221f+
Would you agree with my thinking or am I headed in the wrong direction? Cause next up is removing the fuel rail (again) and tapping into the thermosensor leads?
After this, I'm completely dumbfounded, and it looks like Yamaha is too, cause they suggest 'change ECM' (I think I would add a manual fan switch before I did this)
...and a little more additional info, my ECM is flashed, and I have tried it in 'S' and T mode it does the same thing