08 Mastiff died

[Mr. Wright]

We were out for a 3 hour cruise this morning, and all was well. We stopped for a short break, and it fired up just fine, then 15 miles down the road, it lost all power. I had a test light, and the battery wouldn't even light it up. So I pulled the battery, (luckily we had a bagger with us) and found a parts house that was just closing it's doors, and happened to have a Harley battery.
I hooked up the positive side, and when I went to hook up the negative side it sparked. One of the wires that is suppose to hook to the negative side is hot. Yes I know I got the wires back to where they belong. I don't know where this wire leads to yet, still waiting for the bike to get here. I didn't have enough tools to work on it down there. Plus there were 5 guys hanging over my shoulder, trying to give their input.
What I do have right now is the old battery. I put it up on the bench and checked it again. 11.9 volts, but when I hook the charger to it, the charger freaks out. Battery is obviously shorted out. Just installed it this last March.
It's this ground wire, that's hot, that has me stumped right at the moment.
Looking for a little input, before I start digging into it tomorrow.

 

[Brew]

I think a picture of so said wire may help. Could it be the ground wire from the V/R?

 

[Sven]

find a main ground harness cable, meaning, it's possible that all the grounds are tied into one big eyelet. If not, but looks like more grounds off the frame, lift each off separately, but first, touch ground to the battery and see if it sparks?

Being that there are no blown fuses, possibly you might pinpoint one of the ground eyelets that may show the way.

 

[Mr. Wright]

I know I'm going to have to chase some wires down. What's funny, I guess it not that funny, but with just the positive side of the battery hooked up, I can take that one wire and touch it to the negative thermal and it sparks. I'll know more tomorrow afternoon. I just got home and seen it was in my shop now.

 

[BadDawg Bill]

Check the positive wire from the VR. It runs under the frame to the battery and can get grounded out easy. Good luck.

 

[FrankBDPS]

How many ground wires are on that bike?

 

[Mr. Wright]

3 on the negative post.

 

[Brew]

Perform a diode test on your V/R, that'll eliminate the V/R from the equation if it passes...

 

[Mr. Wright]

Ok I have 13.8 volts on the ground wire for the EHC or ECU, What ever it is. The key switch is good. I have no lights on the nothing. I do have 13 volts at the key switch. Fixen to pull the plugs on ECU.

 

[Mr. Wright]

Why do they not have some kind of surge protector for the EHC

 

[FrankBDPS]

Would they sell any if it were protected?

 

[Mr. Wright]

The battery shorted out inside. I can't see the EHC craping and frying a battery. None of the wires have rubbed. The whole problem is the ground wire has 13 volts

 

[FrankBDPS]

Something is turned on or has a load on it. You are reading voltage thru that load that is trying to get to ground. Where does the wire go?

 

[Mr. Wright]

It's the ground wire from the EHC to the negative post on the battery.

 

[FrankBDPS]

I am not a genius when it comes to these things but there is something the EHC is leaving turned on and putting a load on that wire. Is the key switch on or off? Does it make a difference if it is on or off?

 

[Mr. Wright]

Doesn't matter. On or off. I can hook up all the wires except that one ground wire, I have nothing except 13 volts at the key, and 13 volts on the ground wire. When I touch the ground wire to the negitive post, it sparks and I still have nothing.

 

[Mr. Wright]

Also FYI, I've isolated the start system and charge system, and no change. The only thing that I don't know is if one of the handle bar switch s is stuck. But still I hace nothing.

 

[BWG56]

A similar thing happened to a buddy of mine with his car, the computer was storing too much info and shutting the car down, dealer suggested holding both the ground and hot wires together on the frame to dump the cookies. So If you disconnected the wires from the Battery and held the hot and ground wire together will it reset or clear so to speak the EHC?

 

[Mr. Wright]

For real? This is what I'm looking for. Everyone else that has lost an EHC, seem to have something that still lights, beeps, or flashes.I've got nothing. Ill try that when I get home.

 

[BWG56]

For real? This is what I'm looking for. Everyone else that has lost an EHC, seem to have something that still lights, beeps, or flashes.I've got nothing. Ill try that when I get home.

We laughed when we first heard of this But when it worked, we were like you got to be shittin me. The new cars store your driving habits and throttle response and transmission shifts all are made according to your driving habits. I can reset the throttle response on my car.
John had his sent to Curtis and the amount of info it had stored on it was incredible.