She’s dead as a doornail, but why? - Road Star Warrior Forum : Yamaha Star Warrior Forums

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Old 10-07-2019, 08:41 PM   #1 (permalink)
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Default She’s dead as a doornail, but why?

Yesterday, my 07 started and ran just fine. This morning, I turned on the key and the lights lit up fine. Hit the starter, thought I heard a very faint pop, and now nothing turns on (almost like the battery is disconnected) and the bike obviously won’t start.

Checked the fuses and they’re all good. Where should I start in troubleshooting this?
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Old 10-07-2019, 09:14 PM   #2 (permalink)
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Is the battery fully charged?.?
I'll give that a try...

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Old 10-07-2019, 09:15 PM   #3 (permalink)
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Did u check battery cables?.?
Ser if there tight..


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Old 10-07-2019, 09:16 PM   #4 (permalink)
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Is the battery fully charged?.?
I'll give that a try...

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Yep, sure is. The bike is always on a tender when I’m not riding it. But even if it was the battery, at least the lights would still turn on with the key even if only very dimly.
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Old 10-07-2019, 10:42 PM   #5 (permalink)
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Wiggled the wires under the ECU and lights came back on. As soon as I hit the start button, heard another quiet “pop” and everything went dead again. No more amount of wiggling made it work again after that.
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Old 10-07-2019, 10:49 PM   #6 (permalink)
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Wiggled the wires under the ECU and lights came back on. As soon as I hit the start button, heard another quiet “pop” and everything went dead again. No more amount of wiggling made it work again after that.
That may be because it arced causing carbon build up between the connections or it actually blew a fuse this time.

Was this the cables or wires you wiggled around?
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Old 10-07-2019, 11:08 PM   #7 (permalink)
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That may be because it arced causing carbon build up between the connections or it actually blew a fuse this time.

Was this the cables or wires you wiggled around?
It was the wires that sit immediately below the ECU but on top of a black plastic tray.

I’ll check the fuses again to make sure that isn’t what happened. I hate electrical work so really hope I don’t have to tear wiring apart that needs repairing!
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Old 10-07-2019, 11:13 PM   #8 (permalink)
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It was the wires that sit immediately below the ECU but on top of a black plastic tray.

Iíll check the fuses again to make sure that isnít what happened. I hate electrical work so really hope I donít have to tear wiring apart that needs repairing!
Try the battery cables with the key on.
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Old 10-07-2019, 11:38 PM   #9 (permalink)
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Possibly a short under the seat based on your posts. Leave key off. Disconnect inspect reconnect each coupling plus look for any separated or loose wire connections.

If a fuse blows then you will know which circuit.
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Old 10-10-2019, 12:35 PM   #10 (permalink)
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I haven’t had a chance to tinker with the bike in past few days but yesterday turned the key on just for shits and the lights turned back on. I recorded this with my iPhone but didn’t post it here... but when I hit the starter button I heard a noticeable buzz come from what sounded like the ECU before everything went dead.

I’m highly tempted to just take this to a shop. I don’t have the time or confidence in being able to troubleshoot this myself.
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