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Two thoughts.* Are you SURE the WHOLE bike shut down (i.e. there was no headlight or tail light?) - I mean from the seat you might not be able to tell.* Wiggle and Tap test - intermittents can sometimes be found by running the bike while wiggling each possible wiring harness and/or gently tapping on the suspect component. Stick a small screwdriver up into contact with the ignition switch and tap lightly on the handle. If the bike cuts out while doing either test, Bob's Your Uncle.I had a bad ignition switch on the Jackal which cut power to the bike running dead straight down the Blue Ridge Parkway, WHEN I hit a bump. The tap test confirmed it.
Positive the whole bike shut down. No lights. No nothing...because when I pulled over to the side of the road, I couldn't even turn on the hazard lights. There were no lights on the dash. Everything went out. I did the wiggle test on the ignition and checked the connections Enzo told me to and I think it may be time to bring a professional because when I worked on electronics when I was building scientific instruments, if I had intermittent, I'd replace the whole board. Too many times I wasted time checking test points that worked when it was working.
Its too dangerous troubleshooting in traffic, you might get run over.Right up front the OP said it was like someone turned the key off.The headlight of a V7 normally stays On with the kill switch pushed and the bike rolling. it stays On for about 5 seconds after stopping and turns back on if the key is On and you move the bike at walking speed, I assume the V9 is the same.Fuse D,E & F are always Live or should be.Fuse A, B & C are on the other side of the ignition switch, they will be dead when you turn the key Off or the circuit fails.The first thing to find out is which group of fuses are loosing power, simple as a small bulb between the fuses and chassis.Start by wiring the lamp to A,B or C and chassis, wrap one wire around the fuse pin any one off the 6 points available, the other can be clipped to a nice shiny bolt, (not the handlebars, they aren't grounded)Once you have your light On then start wiggling stuff, the light will flash when you find the sweet spot, then you can try moving the Lamp to one of the fuses D,E or F the lamp there should stay On when you wiggle the sweet spot or its something to do with the battery connections or main ground.I assume by this time you have cleaned the connections.Note: Sometimes there is a slight error on the schematic, maybe an extra fuse or two but there will be two distinct groups on either side of the ignition switch.Moto Guzzi - making electricians out of riders since March 15 1921
Copy that, I wasn't sure of whole story. Ya know guy pulls over and shuts off key reflexively then "remembers" that everything shut off, but did it etc. You would be surprised how many times an owner gives the tech only a small part of the story.Anyway, parts swapping is generally frowned upon as troubleshooting on vehicles because of the price of the in theory nonreturnable parts. But dealers and techs do it for sure sometimes.On the flip side yoo can't just easily swap out the whole harness so there's a reason to troubleshoot.Good luck
Update: I chatted with Enzo for a bit. The result was that he thinks it could have been just the battery terminal screws being just a bit loose that I tightened. His advice was to ride it locally until I build up trust with her again. If it happens again, we'll cross that bridge when we get to it. Which means to me, I'll either ship it back to Cincy to have him look at it, or trailer it to Richmond or Charlotte (preferences? please lemme know either by reply or PM).
Iíll ask you again...If your bike is running at 3,000 rpm on the centrestand at home and you remove one terminal, will the engine cut out, or continue on the alternator ?Because if you prove it will run on the alternator, then itís not your battery or terminals.
Negative is best for this test. That rhymes
Yes like 99% of the time. On the V11 forum a guy with a running issue that had us all working on it and after 5 pages of troubleshooting proudly informed us he'd found the problem was with the PC3 connection. Problem was he'd not mentioned one was fitted up to that point. Unbelievable timewaster. Ciao
No PC3. My job for 25+ years has been in science and engineering. I'm paid to convey the details. ;)
I'm sorry I missed your question. I'll check that tomorrow.In the meantime I found the problem! I figured I'd jiggle the key in the ignition switch and REPRODUCED THE PROBLEM! I even had my wife look.It doesn't happen every time I did it, but it did it at least twice.So as you all thought, it's the ignition switch. I'll order one up tomorrow.
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