Parasitic Electrical Drain

 I'm chasing a 100 milliamp battery drain on a '07 Street Bob.
So far, I've got it narrowed down to a 30A relay that's somhow being
triggered to pass current though a cable that runs under the gas
tank.  I'm going to pull that cover off the ags tank to test
whatever's under there, but I need a wring diagram to understand
what's triggering the relay.

If anyone has an idea where I can get a quick look at a 07 Street Bob
wiring diagram, I'd appreciate it.
I have an 02 Low Rider electrical manual.  Are the tow wiring layouts
pretty much the same and good enough for chasing a problem like this?

TIA for any tips, quips, and comments.

Ride safe,

Manjo

 On 10/23/2011 10:53 AM, Manjo wrote:

Sounds a lot like a police vehicle I serviced once.  Had trouble pulling
the battery down if the car wasn't started for several days.

When the radio shop installed the siren, they put the siren primary on a
relay.  What they did was hook the relay up backwards, so the coil was
always connected to hot which drew about 100 milliamps.

Might connect a milli-amp meter in line with the battery primary and
then start pulling fuses one at a time to see what kills the relay.  At
least that will tell you what circuit is the troublemaker.

Andy

--
The two most common elements in the universe- Hydrogen & Stupidity

 
I have an amp meter on the battery from testing the fuses.
I pulled each 15 amp fuse (twice) and none cut off the 100 milliamp
drain.
But pulling the 30 amp main fuses did kill the drain.

Your siren problem fits milliamp-wise and my problem may be caused by
some previous work, and could be at the heart of this problem.
The bike has stood around for weeks at a time in the past and never
had this problem.
The bike was just been in the shop and they went through the
electrical system.
Rode the bike home over 300 miles and then it sat for 2 weeks.  With a
constant 100 milliamp drain and a 19 amp hour battery, a week of no
riding would have been enough time for the battery to be drained.
The wrench at a couple of emergency stops on this last trip could have
reconnected whatever sets the coil to a constant HOT line.  Since the
bike was ridden everyday for two weeks, the drain would not have been
enough to take the battery down overnight.

I'll put the logic probe on the relay again to make sure it's
connected correctly.
Then work back from there.

Thanks for the tip.

Manjo