Question about 2007 Harley Davidson FXSTC Softail Custom

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Bus error, engine, battery and security light flashing. Speedo also acting up. Why?

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  • Gills Lango Nov 15, 2014

    Hi Tony woodman, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?



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With all these different symptoms, I would start looking for a bad earth connection. Check all earth connections starting at the battery earth. Softails are inclined to corrode all the connections behind the rear wheel splash plate (behind the oil tank). Also, I have seen the wiring loom damaged under the seat right beside the battery connections. The cause of this is usually a non Harley battery with longer than stock connections and they rub against the loom shorting into it. This in turn can and has damaged ECU's.

Posted on Mar 09, 2015


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2 Answers

Security light flashing fast when turning the key to start,

It's not recognizing the security chip in your key.

You didn't bother to list Make, Model, or Year, so I can't help you any further.

P.S. Speedo is a swimware company, not part of a vehicle!

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Hi Anonymous, and the usual suspects are:
1.Ignition/Light Key Switch not in IGNITION position.
2.Engine Stop switch in the OFF position.
3.Discharged battery, loose or corroded connections check negative cable at both ends. (solenoid chatters).
4. Bank Angle Sensor tripped and Ignition/Light Key Switch not cycled to Off and then back to
5. Starter control circuit, relay or solenoid faulty.
6. Electric starter shaft pinion gear not engaging or over-running clutch slipping.
For a prime suspect please visit website below and good Luck.
Harley Diagnostic Codes 04 to Present

Btw, I’m available to help over the phone in case u need at

Jun 04, 2012 | 2007 Harley Davidson FLHTCU Ultra Classic...

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