[St] New little flakeout

[Steven Kohlscheen <trumpst@xxxxxxxxxxx>]

OK, I got a new little wrinkle to run by the list.  Basically when the cooling fan kicks in, the fuel gauge goes to empty.  Once it reaches empty the MIL light comes on.  Once the fan goes out, the gauge recovers.  I had it do this too me in stop and go traffic a few weeks ago, and figured it was just overheating the connection to the sender unit, it opens up, causes the loss, but when I get moving and everything cools off, the circuit closes back up.  And I did find the dealer mechanic who last worked on it didn't fully seat the connector.  But it did it sitting still just last week, after I fixed the connector.  Fan kicks in, gauge goes down, fan turns off, gauge recovers.  I let the bike run long enough to go through this cycle twice. Verifying the correlation.  Of course, the MIL light stays on until the 3 heat cycles, ugh.  I haven't had a chance to run by the dealer to get the actual code, but I'm betting it's something about bad reading from the fuel gauge sender.  Anyone heard of this before?  Suspect the fan is pulling too much juice maybe?  The engine will have a millisecond of stumble when the fan kicks on, but it's had that for some time now.  Anyone?
 
Steven "Dirty Dawg" Kohlscheen
2002 Triumph Sprint ST
2001 Yamaha YZ426f
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