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Serious Wiring Problems: 2007 Fat Boy

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  #11  
Old 08-21-2022 | 12:13 PM
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Originally Posted by Dan89FLSTC
That is not a twin cam engine.

And not a Harley engine, it is some brand of aftermarket Evo copy.

The ignition module is for `96 and later Evo.

I think I can see a CV Carburetor, and it has head breathers.

Pull the dash and show us what it looks like underneath, ignition switch etc.

Also a couple of pics of the switches on the handlebars.

Will do. The carb has the HD emblem right on top of it. The guy told me it was a 2007 Evo...but I wasn't sure.

I will post more pics in a few minutes.
 
  #12  
Old 08-21-2022 | 02:08 PM
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I have been getting a short reading with my múlti-meter across all of the fuses. ECM, all lights, ignition have all been disconnected. I have fixed all but 1. The white wire going to the headlight. It is giving me a reading. The light is disconnected, so, its not the light...

The other 2 was the horn. Once i disconnected the wires, those ground sorts disappeared.
 
  #13  
Old 08-21-2022 | 02:27 PM
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You should remove the main harness and inspect it, you will just drive yourself nuts messing with it on the bike.
 
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  #14  
Old 08-21-2022 | 03:48 PM
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Originally Posted by Dan89FLSTC
You should remove the main harness and inspect it, you will just drive yourself nuts messing with it on the bike.
I'm in the process of doing that now.... good advice.
i also was talking to a friend of mine a little while ago. Sent him pictures as well. He said it looks like a late 90's Evo. 97-99 maybe?
 

Last edited by SneakyBastard; 08-21-2022 at 03:50 PM.
  #15  
Old 08-21-2022 | 04:04 PM
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Check the VIN, as Vernal suggested back in post #8.
 
  #16  
Old 08-23-2022 | 12:25 PM
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I've figured out the wiring issues, mostly. There was a direct short between the two connections on the horn. Not a readable resistance, a dead short. Disconnected it and the curse stayed intact.

The other problem, i am ashamed to say, was a damaged or bad battery.

With no draw, it was reading 12.76 volts. With no lights on and switch turned on, dropped to 9.01 volts. With lights on, dropped to 0.0 volts. Tried to light up a single bulb by direct connection, dropped to 0.0 volts. No light.

Switched batteries and reconnected all wires he had cut, except rear lights (fender and lights aren't on the bike), starter solenoid rebuilt and replaced with a push button, replaced oil, etc., hooked up all sensors (neutral, oil, etc.) And gave it a go. Everything was on, working, starter turned the motor over strongly.... but now i have no spark.

Changed the coil pack 3 times. Neither one gave spark.
Checked wires from breaker (distributer) and all looks fine. Tried reversing coil wires, no difference.

So now i am assuming ECM? It isn't in the best shape.

Or could i be missing something else?
 
  #17  
Old 08-23-2022 | 12:26 PM
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Originally Posted by Dan89FLSTC
Check the VIN, as Vernal suggested back in post #8.
It is a special construction. Not an original HD frame. VIN comes back from DMV as a 2007 HD Special Construction. That's all.

Plus an ungodly amount to register!
 
  #18  
Old 08-23-2022 | 04:21 PM
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Is there power going to the coil?
 

Last edited by Dan89FLSTC; 08-23-2022 at 04:25 PM.
  #19  
Old 08-23-2022 | 06:04 PM
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Originally Posted by Dan89FLSTC
Is there power going to the coil?
Yes. The White/Black wire has 12.87 volts. Pink/White wire, nothing..


could this be the problem? I wouldn't think you can short an ECM then tape it back up and hope it works...., could you?
 
  #20  
Old 08-23-2022 | 06:12 PM
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The derby has 5 bolts, which is TC typically evo has 3. Harleys in 2007 were all FI. I couldn't tell what the engine was. Rocker covers are not TC.

What happened to it that everything is repaired?

It is some kind of special construction

 

Last edited by Rounders; 08-23-2022 at 06:17 PM.


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