key off headlight came on

Energy One

makithapn

Member
I like to think I can figure out about anything with the great info on this site
but :confused: Last trip to the Smokies I started having what I thought was a battery connection problem as I would hit the start button I would loose all power. Tighten battery post and all seemed fine. Happened several times on way home. Got home decided to clean up battery connections. soldered small wire connectors that go to battery post. checked both battery cables with multimeter no resistance. reassembled hit starter button bike started right up, (once) then every time after just looses all power, cycle key power comes back. Decided to think on it a little more went in house bike is on back porch other side of sliding glass door. Headlight came on with key off WtF ?? Keyswitch bad ?? I noticed the starter wire that goes between the starter and solenoid was hot. Could oil in the starter cause this ? Installed slam button that I got from wild steed works ( must have been sent on their private jet, ordered it sun got it in South Florida Tues) :eek: thinking I could get around bad pc board or what ever problem I am having, too much comp without activating comp releases. Any body have a problem like this before ?? Need to think some more. 2006 k9 still have ECM but running thunderheart ignition brallie batt shows 12.8 at rest drops to 10 volts when hit start button
 

Brew

Troop Supporter
Wow, that's quite a drop in the battery juice. A 2.8 Volt drop is quite a lot...:eek:
 

makithapn

Member
I thought it was a lot too but I tested the wife's Iron Horse same results. Not apples to apples but what I have here
 
I like to think I can figure out about anything with the great info on this site
but :confused: Last trip to the Smokies I started having what I thought was a battery connection problem as I would hit the start button I would loose all power. Tighten battery post and all seemed fine. Happened several times on way home. Got home decided to clean up battery connections. soldered small wire connectors that go to battery post. checked both battery cables with multimeter no resistance. reassembled hit starter button bike started right up, (once) then every time after just looses all power, cycle key power comes back. Decided to think on it a little more went in house bike is on back porch other side of sliding glass door. Headlight came on with key off WtF ?? Keyswitch bad ?? I noticed the starter wire that goes between the starter and solenoid was hot. Could oil in the starter cause this ? Installed slam button that I got from wild steed works ( must have been sent on their private jet, ordered it sun got it in South Florida Tues) :eek: thinking I could get around bad pc board or what ever problem I am having, too much comp without activating comp releases. Any body have a problem like this before ?? Need to think some more. 2006 k9 still have ECM but running thunderheart ignition brallie batt shows 12.8 at rest drops to 10 volts when hit start button
What this sounds like to me is a short, I would re check all wires to make sure no wires are stripped/cut and check all your connections. Could be a loose wire in the ingition. If you are checking continuity and not getting any it means there is a break in the wire somewhere. hope this helps
 

BigDogBro1

Made in the USA
10.5 volts is what we got on a battery crank test just a few weeks ago now on an 07 Bulldog. Seems acceptable to me.

The EHC might be seeing a bad keyswitch input and turning itself ON. The EHC looks for a GROUND condition from the keyswitch to turn ON. Check the keyswitch signal wire resistance to ground with the battery disconnected, it should be a high value ohms reading.

The keyswitch could be going bad it it's getting a loose key fit.
 
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makithapn

Member
Thanks Paul, I am checking all my wires again starting with cleaning the starter to the solenoid wire then ignition wires as the thunderheart ignition was the last change to my bike.
Been running fine for 2000 miles last trip to the smokies.
 

makithapn

Member
checking my key switch wires like you said BigDogBro 1, my key is not as tight as it used to be. But the only thing coming on when I attach the ground to the battery is the headlight nothing else works until I turn the key on
 
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