| Author |
Message |
    
Mmcn49
| | Posted on Sunday, June 01, 2014 - 12:33 pm: | 
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Went for an evening group ride a couple of weeks ago. Rural area lots of “Twisty’s” really got into things. It was a nice day and the evening was warm. My fan came on ten or so minutes after getting into it. It never shut off while riding for maybe 30 to 45 minutes. It has never run continuously like this even on hot days.
The ride came to an abrupt end when the group leader hit and killed a deer, (he was wearing full race leathers and suffered only minor injuries) not so his bike.
When I shut the bike off the fan went through its normal shutdown sequence and stopped. One of the guys went home and got his pickup truck. Several hours later after loading the bike I drove home. After the sun went down temperatures cooled quickly and the fan never came back on.
Yesterday was warm and sunny and I went for a short ride in the afternoon. After about 30 minutes the fan came on for only a few seconds then the CE Light came on.
Here’s what I found after going home:
10 Amp Fan Fuse was Blown.
ECMSpy diagnostics indicated that something was either open or shorted.
Replaced 10A fuse and ran the fan diagnostics with ECMSpy
Fan didn’t run and 10A fuse blew.
Did this a second time.
10A fuse blew a second time
Replaced the 10A fuse with a 15 Amp Fuse and ran the fan diagnostics with ECMSpy
Fan ran during the Diagnostic Test but didn’t shut down after test.
Turned ignition switch off but fan kept running.
Waited several minutes and pulled the fan fuse to stop fan.
Reinstalled 15A fuse and turned ignition key on
Fan did not start.
Ran diagnostics once more with same results.
NOTE: Engine was stone cold during all testing
I haven’t started in depth Troubleshooting yet. The flow chart indicates several shorted wire possibilities plus possible ECM or Temperature Sensor failures.
Any and all comments and/or suggestions are welcome. Won’t really be able to seriously start troubleshooting until next week. |
Gabby_duck
| | Posted on Wednesday, June 11, 2014 - 06:44 pm: |
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I think you have a defective fan thats drawing more than 10 amps but less than 15 amps.There is a inline amp tester at harbor freight that would allow you to plug directly into the fans fuse spot that would give you the true amp draw.Other than that you would have a short in the wire harness drawing amps. |
Reepicheep
| | Posted on Thursday, June 12, 2014 - 08:00 am: |
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Sounds more to me like a problem with the wiring somewhere. Common failure points are cracked ECM's (more common on Uly), nicks in a wire bundle to the ecm that goes over the battery terminal (more common in lightnings), and cracks in wires going under the steering head from the flyscreen. |
Mmcn49
| | Posted on Tuesday, June 24, 2014 - 12:20 pm: |
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Greetings and thanks for responding to my questions. Here’s what I’ve found/done:
The fan running continuously was either caused by a failed/failing or intermittent Engine Temperature Sensor, or a Relay with a stuck contact.
The Temp-Senders wire is covered with high temperature silicone insulation. There is a woven heat sleeve covering the insulation. Inspecting the sensor after removal showed that the heat sleeve had broken down and the sensors rubber cap was cooked pretty good.
I found nothing wrong with the sensor but because it can fail intermittently I chose to replace it. I found nothing wrong with the relay but new relays are cheap and only cost $5 each. For less than the cost of a pair of Iridium plugs I replaced all three relays.
Fan: The two fan wires are covered with a vinyl sheathing for most of their length. About an inch to an inch and a half up from the connector the vinyl sheathing was melted. Insulation on both wires had also disappeared allowing the wires to make contact.
After finding this I tried to see if there was any way that the wires came in contact with the valve cover. I even reinstalled the fan. There is no way that the sheathing could have touched the engine.
The exposed copper in the wires had a little black oxidization and they were turning that dull Navajo Red color indicating that they were not covered with insulation for some time.
I replaced the fan but will replace the wires on the old one and have it as a back-up.
All is well. |
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