Question about 2000 Harley Davidson FLHTCUI Electra Glide Ultra Classic

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I recently removed and cleaned the battery cables and three small wires on my 2000 Ultra Classic. Didn't pay close enough attention to the three small wires that I removed from the ground terminal and possibly the positive terminal. Do all three small wires connect to the ground terminal or does one (the longer of the three with rubber insulation for about 1 1/2" down wire at terminal connector) connect to the positive terminal? I have all three of them on the ground terminal and after riding about 12 miles, which included starting the engine a total of three times, (initial start, after washing bike, and after filling with gas), the engine sputtered bad, voltage was at 8v, I immediately stopped in a parking lot and bike had to be trailered home. Battery is 6 mos. old and recharged normally when I got home. Do I have a small wire on GROUND that should be on POSITIVE? Or do I have other problems? Thanks for any help. G. H. Douglasville, Ga.

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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

Posted on Apr 03, 2011

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