I was going to take my Sportster in to sell it this morning, but yesterday, the battery was pretty much dead (would only click) so I put the carger on it with 2 amp charge all night. I did this during the day and did not realize I had left the ignition switch on. I turned off the ignition this morning and have been charging for several hours, but I get nothing when I turn the ignition on. Not even the odometer comes on, no lights, nothing. I checked the 6 - 15 amp fuses near the battery and the main 30 amp fuse. All appear to be in good order. Is there another fuse or something to check that would disable all the power. I even switched the charger top 75 amp start mode and get no power from the ignition.

Thanks

 

Charger likely can't bring the battery back to life.

 

But why would I get nothing at the ignition even when on at 75 amps? When the battery was partially dead, I could start the bike in this mode in the past. Did I somehow short the battery and now it is not allowing the charger to get thru?

 

Do you have a volt meter? If so, hook the battery up and put the volt meter on. See what the reading is when installed and when the ignition is on.

 

I connected the volt meter to the battery with the ignition off and it only read about 4.8 volts. When I turned the ignition on, it dropped to like 0.8 volts. I put the charger on it and it, with the ignition off, and it still only read about 4.8 volts.

 

Yeah, I'm going to go with fried battery. Once they're completely depleted there isn't much that'll bring 'em back.

 

OK. I thought that was probably the answer, was hoping it was not. I bought that battery not too long ago and it was about $110. Do you know if Wal-mart or Auto-zone might have a cheaper alternative that would work? Thanks for all the help.

 

Sounds like you have shorted cells in the battery. Time for a new battery.

Leaving the key on (with lights on) creates a load on the battery of 8+ amps, more if the bike is EFI. The 2 amp charge was far less than the load, and as a result your battery is in a "stone dead" condition, which typically damages the cells.

 

Replace the battery, yours has retired.

 

+1....