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Wiring and Electrics Questions, answers and posts pertaining to electrical mods and problems

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Old 10-25-2015, 06:43 PM   #1
Kit Kat
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Default 2001 750F Key On, No Power

I've seen similar posts that usually pertain to ignition switches or battery issues, but this problem is neither and it has me stumped.

The backstory:
Came out of work to start the bike that had be cruising flawlessly less than two hours before. Nothing. Turned the key and zero power to anything. No dash, no lights, nada. And the clock, that had been working with the key off, also lost power with the key on. Turned key off and power restored to the clock. Ultimately towed home.

The battery shows 12.6V, charges at 13.5V. All fuses, including mains have been confirmed good with my trusty Fluke. Starter relay continuity checks out. Thought it might be ignition switch and initial continuity tests seemed to confirm that, but $141 later, the new switch does nothing to fix the issue. I've ohmed wiring from ignition switch going to fuse block and ICU and all have continuity. Checked all my grounds and no loose or corroded connections.

I'm at a loss as to what it might be. Anyone know if diodes in the turn signal/side stand relay might cause this issue if the relay is bad? Anyone had this issue before? Only 17,000 miles on the bike. Any advice appreciated. Thanks!
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Old 10-25-2015, 06:51 PM   #2
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Have you checked the 30amp fuses on the starter relay.
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Old 10-25-2015, 06:55 PM   #3
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Those would be the Mains and yes, they were the first thing I checked. All fuses have been confirmed good using a multi-meter.
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Old 10-25-2015, 06:58 PM   #4
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Check the electrical plugs under the tank.
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Old 10-25-2015, 07:15 PM   #5
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I'm guessing you mean the HT Coils? Both checked for continuity and seem ok. Connector for ignition switch checks out as well.
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Old 10-25-2015, 07:19 PM   #6
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Did you check the relay and all fuse connections.
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Old 10-26-2015, 07:19 AM   #7
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What's the condition and routing on the wires underneath the tank, and the ones that go up the right side behind the main fairing?
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Old 10-26-2015, 08:14 AM   #8
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I am not sure if you are aware of this, but there is 1 fuse that is not in the fuse block.
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Old 10-26-2015, 08:25 AM   #9
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Wonder if that relay went bad...
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Old 10-26-2015, 06:03 PM   #10
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Steves, The wiring under the tank (I believe you mean the bundle that includes the connector for the ignition switch) is good. All have been ohmed and show continuity. The power wire going to the connector shows 12V.

ZukiFred, As mentioned previously in the thread, the 30A Main fuse was the first thing I checked. I've had it go out once before, with similar results. But in this case, the fuse is ok.

92xjunker, I tested the starter relay for continuity between both poles by removing the connector and the relay seemed to be ok, but I'm beginning to wonder if despite showing continuity if the relay might be toast. I'll dig into it some more later today. I may be at a point where I just systematically start going through the entire harness. Arg.

Thanks all for the assistance. Much appreciated.
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