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You are correct - my vision is not as good it used to be and I got off tracing the wires - I should have paid more attention to the numbers - wire 84 is hot 24/7 - I confused wire 84 for wire 90 when I was tracing the diagram
 

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Discussion Starter #22
I cut the RD/BK on pin S and measured the voltage coming out, 7.77VDC with the switch on. I jumped the other end of the RD/BK wire I cut to 12VDC and tried to start, no go. I cut the black wire going to the ECU, no start. About to solder it all back together and sell this thing for parts..........
 

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I cut the RD/BK on pin S and measured the voltage coming out, 7.77VDC with the switch on. I jumped the other end of the RD/BK wire I cut to 12VDC and tried to start, no go. I cut the black wire going to the ECU, no start. About to solder it all back together and sell this thing for parts..........
Might as well - if you are not willing to spend the money to have someone with the tools to fix it, then you will be better off without it. If I buy an airplane, I will not try to fix it myself and I sure would not take it to a lawn mower shop for repair. You bought the fuel injection technology, but are unwilling to have a fuel injection technician work on it. Do you fix your own computer or smart phone? You gave it your best shot now get rid of it and get something with a carburetor that a monkey can diddle with. Sorry, I am having as bad day. I get frustrated just like everyone else and your frustration just exacerbated my frustration.
 

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Take two aspirin and call me in the morning! Tomorrow won't be any better when you look out the window at 6+ inches of wet heavy snow!
 

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Discussion Starter #26
latebird I do fix my own computer, smart phone, TV, vehicles, ATVs, motorcycles, tractors, chainsaws, everything........I do know that other people know more about things I do not deal with on a daily basis. So I took your advice and took it to a local and reputable ATV repair shop. Diagnosis?.....BAD ECU. What I should have done was pulled the ECU out to closely look at it, then I would have heard that something significant inside has come loose and is rattling around in the ECU like a fishing lure.

So, has anyone ever taken an ECU apart? It does not look easy, I am guessing a component inside came unsoldered.
I will likely buy a new ECU, I understand I will have to get it programmed. I will post what happens to hopefully help someone else out in the future..........
 

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Well, you might be a pay grade above me in a couple of fields - while I might fix my computer and do my own network IT, I don't screw with phones, but I can weld and build bombs. Make an explosive with 2 ingredients or a high explosive with 3 - I have bookkeeping and machinist skills, can cook and sew, but I'll be damned if I can lay brick. We all have our abilities and talents, but I only fixed one CDI (not quite an ECU) on an old Yamaha dirt bike that water had corroded a diode off of.
 
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