A New Sort of Dash Problem for the 1100 Breva?

[skippy]

So I took the 06 Breva out for a fantastic ride down the Peak to Peak a few weeks ago for the Northern Colorado Guzzi Club Breakfast in Golden.
The bike ran like a champ, just as she always does. On the way home I stopped in a shady park to cool off and drink some water. A local drove by really slow and then even turned around to come back for a second look. We chatted for a few and the last thing he said before I left was, "Would you ride her to Alaska tomorrow?"
I responded with an enthusiastic "yes".
The next day I rolled her out of the garage to go to work. Thumbed the button and got the classic anemic clic from the relay. No problem, I wired up the parallel circuit with a switch. so I reach down, flip the switch and try again. clic, nothing.
Dang it! I roll the bike back in the garage and take the stupid car to work.
Now my mind is running. The bike has a new battery so that surely isn't the issue, but it could be in the realm of possibility. I double check all of the wiring harness and pay special attention to the added starting circuit though I haven't had any issues with it since it was put on years ago.
The next night I really dig in to it. I put the key in the ignition switch and turn it on and get nothing. I mean nothing! I put a meter across the battery and sure as heck the battery is deader than a door nail.
Crap. Well, I still have the old battery that I recently took off so I check that one and it showed 12.7 volts. Cool. I swap them out and put the bike on the battery tender overnight and go to sleep. Can't wait to ride to work the next morning.
Nope. Came out to the garage the next morning gear on and ready to go. I noticed the tender was still in charging mode. "Well that is weird", I think to myself. Just for grins, I grave my meter and through it across the battery real quick and it shows 4.5 volts. Jumpin jesus on a pogo stick! I go back in side, drop my gear on the floor and grab the damn car keys again. This time I feel like a real idiot since I didn't have time to change out of my leather riding pants. Driving an old YJ Jeep in leather is weird.
All right. Now I have two dead batteries and neither one is taking a charge. That sucks. I guess when the get discharged that thoroughly they get cooked? I don't know. The are of the AGM ilk.
I have yet one more battery to use for trouble shooting. This one is way to big to fit in the bike but it has a good charge and I only need the electrons.
So I start by pulling every single fuse and relay off.
I then start adding fuses, beginning with the 30 amp main fuses.
Right away with the addition of the first fuse I start drawing 12.5 volts. I take it out and try the other main fuse. 12.2 volts.
The only thing these fuses supply are the Ignition switch, the Instrument cluster, and a handful of smaller fuses.
So I disconnect the ignition switch to further isolate these circuits and get the same results.
With the ignition switch disconnected, and no fuses or relays on the bike, I could add either of the main fuses and immediately see a draw on the battery. It didn't matter witch one I put in either. As soon as the fuse was in there was a very audible noise coming from the instrument panel for a moment and a draw from the battery though no lights came on and the clocks didn't swing?
What the heck? What could possibly consume enough power from a healthy battery (or two) and kill it over night?
No lights, no blown fuses, no signs of a short.

I am dumb founded folks. I hope some of you may be able to point me in the right direction.

Thanks
Skippy

[Chuck in Indiana]

Take this with a grain of salt because I'm no sparky. Someone that *knows* will be along shortly. A basic trouble shooting method would be to solder a couple of wires on a taillight bulb and install that in place of the fuse. Moving wires, etc. around/ unplugging things to make the light go out would be the goal. No, I haven't looked at the schematic, but that would be the first thing I'd do.
http://www.thisoldtractor.com/guzzi007/schematics/2005_Breva_1100.gif

[Dean Rose]

https://wildguzzi.com/forum/index.php?topic=80041.0

[Chuck in Indiana]

^^^^ I'm pretty sure this problem isn't startus interruptus.. there is a constant drain on the battery.

[Moto]

Take this with a grain of salt because I'm no sparky. Someone that *knows* will be along shortly. A basic trouble shooting method would be to solder a couple of wires on a taillight bulb and install that in place of the fuse. Moving wires, etc. around/ unplugging things to make the light go out would be the goal. No, I haven't looked at the schematic, but that would be the first thing I'd do.
http://www.thisoldtractor.com/guzzi007/schematics/2005_Breva_1100.gif

  Excellent suggestion.

If that much power is used up overnight, it has to go somewhere, namely to heat. You could try to detect that heat with the back of your hand or with an infrared thermometer. Does the dash get warm? What about the starter? The ignition coils?

Moto

[Kiwi_Roy]

Do as Chuck suggests put a lamp in place of each fuse one at a time
None of the circuits should have enough current to light the lamp.

Re Battery Tender.
If you connect this up to a dead flat battery the tender doesn't know what to do so it just sits there.
To get the tender to start put the flat battery in parallel with one that has 12 Volts in it.
OR
Use a simple transformer rectifier that always puts out Voltage, like an old Wall Wort for a printer rated at 12 Volts 250 milliamps or more.

http://www.thisoldtractor.com/guzzi007/schematics/2005_Breva_1100.gif
Perhaps pull the two main fuses while you charge up the battery, you could even pull them at work until you get it sorted.
Any chance the heated grips remained On?

[skippy]

Excellent suggestion.

If that much power is used up overnight, it has to go somewhere, namely to heat. You could try to detect that heat with the back of your hand or with an infrared thermometer. Does the dash get warm? What about the starter? The ignition coils?

Moto

Do as Chuck suggests put a lamp in place of each fuse one at a time
None of the circuits should have enough current to light the lamp.

Re Battery Tender.
If you connect this up to a dead flat battery the tender doesn't know what to do so it just sits there.
To get the tender to start put the flat battery in parallel with one that has 12 Volts in it.
OR
Use a simple transformer rectifier that always puts out Voltage, like an old Wall Wort for a printer rated at 12 Volts 250 milliamps or more.

http://www.thisoldtractor.com/guzzi007/schematics/2005_Breva_1100.gif
Perhaps pull the two main fuses while you charge up the battery, you could even pull them at work until you get it sorted.
Any chance the heated grips remained On?

Both of these are good points for me to consider. I have two different chargers to use but I didn't think that they wouldn't work on a discharged battery.

I will try the pull the main fuses option tonight.

Thanks. I will keep plugging away at this.

Skippy

[Zoom Zoom]

What about a stuck relay keeping something energized?

ZZ