Power up circuit

[JeffM]

Greetings from the OZ,

I have had a few electrical issues with my 08 K-9, now a few of you cynical bastards out there would find that hard to believe, but for those following my journey will remember the saga related to the L/H handle bar control switch circuit board and the flasher fiasco.
I have now gone to a new circuit board but not connected to the flasher, i even found a "flasher unit" wired into the circuit....................."what the F". Obviously that part of the EHC don't work.

Recently (last Sunday) while out riding it died and would not restart, after deciding it was a flat battery i got a jump start to ride the 40 miles to home, yep you guessed it 50 yards from home up a hill it died again. Got a battery from my fat boy and it fired up straight away.
The following day i started the fault finding and located it to be the Voltage regulator.
Before i changed it i started the bike and checked all functions (except the L/H flasher) and noted that the 'POWER UP CIRCUIT" light on the EHC was flashing................Voltage regulator replacement should fix that i thought, alas no. With the new reg in place and charging away at 13.5 volts the light is still winking at me.

WHAT DOES THAT MEAN??????????????? :bang:

Jeffm

 

[Moespeeds]

As the EHC goes bad you may lose specific functions one by one, and intermittently. From your post I think you're saying that you're not the first owner, and someone has wired in a flasher circuit to cover that function on the EHC. What made you think the VR was bad? A bike with a fresh battery will start without a VR, all that does is charge it.

 

[JeffM]

Correct on all counts Moe.
Yes the recharged batt started the bike no worries, but there was no power from the VR, and the stator had 77volts at 4000 rpm. Also checked for resistance accross the poles and each pole of the stator .............. all good.
So now that a new VR is installed it is charging away at between 13.2 and 14.5 volts.
BUT this little POWER UP CIRCUIT light keeps blinking. Not a constant light.
I am assuming it is because of the flasher circuit not functioning.

When i get organized and when it is raining or too bloody hot to ride or go fishing i will post pic's of all the offending bits, as an example of what not to do for our fellow BDM owners

 

[V]

If its the light on the EHC I'm thinking about the blinking may change as you rev up the engine. My 08 does this as well. I called BD about it when I got the bike in 08 and they told me that it was set up that way for that 1 circuit. Also just for kicks I had too replace the VR on my 08 at about 3000 miles. It slowley died. The new is working good ( 2 years now) but I check it with a meter from time to time.

 

[stlmikie]

Is that the same circuit that the ignition is on?

 

[DRBarnhart]

... the 'POWER UP CIRCUIT" light on the EHC was flashing... WHAT DOES THAT MEAN?

Check section 13, page 7 of your service manual.

So now that a new VR is installed it is charging away at between 13.2 and 14.5 volts.

Are you measuring this at the battery? Or directly from the VR? And you've checked the circuit breaker right?

Dennis

 

[JeffM]

Hi Dennis, i checked the circuit breaker and had good conductivity showing the same volts in as out.
Yes measuring at the batt.

Took the Dog for a long walk last weekend 400miles in 100degF + temp and no problems at all.
So hopefully i can put that behind me now.
I still have to work out how to get my left flasher to work, i may have to re-jijjer the Circuit board same as the one that melted on the former owner.
I see you have a BMW my fare better half has an '83 650 and won't swap it for anything.
I have bought her 2 Harley's and she won't ride either...............bloody women.

 

[JeffM]

Hi Dennis, i checked the circuit breaker and had good conductivity showing the same volts in as out.
Yes measuring at the batt.

Took the Dog for a long walk last weekend 400miles in 100degF + temp and no problems at all.
So hopefully i can put that behind me now.
I still have to work out how to get my left flasher to work, i may have to re-jijjer the Circuit board same as the one that melted on the former owner.
I see you have a BMW my fare better half has an '83 650 and won't swap it for anything.
I have bought her 2 Harley's and she won't ride either...............bloody women.

 

[DRBarnhart]

Hi Dennis, i checked the circuit breaker and had good conductivity showing the same volts in as out.
Yes measuring at the batt.

:2thumbs:

I still have to work out how to get my left flasher to work, i may have to re-jijjer the Circuit board same as the one that melted on the former owner.

I'm curious how the left turn signal was/is wired that would smoke it considering there's no power up there. It's only a ground (-) switch.

I see you have a BMW my fare better half has an '83 650 and won't swap it for anything.

Got the BMW in boxes many years ago and rebuilt it. Now it just sits in my garage. I should probably find someone to sell it to that would appreciate it more than I do... :lol:

Dennis

 

[JeffM]

'm curious how the left turn signal was/is wired that would smoke it considering there's no power up there. It's only a ground (-) switch.

I have a wire going up there to a micro switch from a flasher unit............ahhhhhhhhhhhh.
I have had an electrical engineer look at it and he can't figure out what they have done or how the came up with the idea.
But it appears that part of the EHC is fried, so they jury rigged it.

I will post pic's when i can get some me time away from work, it is a master piece of electrical wizardry.