Battery termanals coming lose

COuld be a bad battery or there is a loose (or corroded) connection somewhere. Check to be sure everything is tight, and clean on the battery terminals. If this happens after short trips, or after trips when your bike sat for a while, or on colder days it's probably just time for a new battery.

First thing to check and is usually the problem is the Negative battery terminal on the battery. When they come loose they will start arcing as well and will build up carbon on the battery connection and the connectors hooked to it. If it is loose, check and remove any carbon build up on them (chip, sand, file, grind, etc. etc.).

remove the neg cable and place a test light between cable and post and see if light comes on,if so then start removing fuses until it goes out that will narrow down your problem, if the light does not come on have the battery check it could have a faulty cell

Check voltage at the battery terminals. it should be approx 13-14 volts when running at about 2000 revs. these are not specific to your bike , these numbers may be as high as 14.7volts or 3000 revs. revs are usually at just above idle. If the voltage at the battery terminals is below 13 you have a problem with your alternator or regulator/rectifier. Incidentally the battery voltage is DC.

Well it depends. I don't have a schematic for the 2000 Ultra but usually Harley doesn't any small wires connected to the battery. Years ago they did having a single large gauge wire for the general wiring in the bike. But, in recent years, they have moved that wire to the same connection as the positive battery cable connects to the starter. Now, the small wires may be for aftermarket "add ons" that someone has put on the bike like a battery charging pig tail, a security system, or something else. I have no way of knowing. My suggestion would be to get a schematic or try to trace the wires and see where they go. If they are for something like an aftermarket ignition system, which normally connects up at the ignition coil for it's power source, reversing the polarity of the unit could result in damage to the unit.

Good Luck
Steve Bentley

I had a problem when I first purchased my bike, I could start the bike 3 times and even after riding the bike would die. I ended up having to have the Harley Dealer come out and pick up the bike to fix it. Turned out, they had to "update the system software" on the bike. Hope this helps.

It is likely that youve popped a fuse
The battery would have to be totalled to behave like that
But it sounds like the battery isnt being charged properly. Make sure the voltage across the batt terminals is at least 13.5v at tickover rising to no more than 15.5v at higher revs
Make sure the battery connections are TIGHT as well
Ride-Safe
Bike-Doc

Please mark this as helpful (if it has been!!)

Check the connections on your battery terminals. They could be loose and/or gummed up.

Discounect the battery and clean up both the wires and terminals on the battery using a wire brush and electrical parts cleaner.

IMPORTANT!- do NOT ground the battery out by cleaning both terminals at the same time. LOTs of sparks and fire hazard. Plus that whole shocking yourself isn't fun either. Been there.

If that doesn't fix your problem, then more than likely you have a short coming off of your charging unit in the primary, or a bad ground.(Left side cover) Its a new bike, so there's a very small chance that its the charging unit itself.

Hope this helps

Good Luck!

Skuban

Check the charging rate of your bike, see if its system is charging, if it does charge thn theres somewhere the battery is getting drained out.
In order to see if tht is happenning, switch off everything and thn remove one battery wire on the battery, after doing so try to fix it back and notice if theres any sparks when it comes to the contact of the battery terminal , if so thn theres a drain somewhere in the electricals and wiring.

Good luck.
Knight (Yamaha Seca XJ750A 1981)