Originally Posted by ZeusCoarsegold
Hi. My '02 K1200 LTC has an interesting problem, I may have caused.
I've charged it many times, but last time I left it on over night. Yeah, oops. OK, it charges the battery, but when I accelerate or just pump the throttle at a standstill, the headlights, dash lights, stereo, turn signals, heaters - they all flicker!
While the flicker is going on, the engine is running fine, the computer readout is working fine. No problems with the brakes, just the other electrical items.
I replaced the battery, the connections are clean and tight, the ground connections are fine and untouched. No wires are missing.
Has anyone else experienced this? Is my alternator shot? Voltage regulator? I'm at wit's end with this.
I do not understand your first statement... charged what? how? left what on over night? What charges the battery? how do you know?
You can tell if the heater is flickering? how?
Running UP the engine speed should cause MORE power *to be able* to come out of the alternator. It would not surprise me if your headlights, seat heater and stereo are all on, you may be running off the battery. Rev up the engine, the headlights very well may get brighter, if that's your definition of "flickering", that's probably normal and fine. If you are talking about the lights getting DIMMER, or actually blinking between normal and dim (or normal and brighter) while at a steady speed, yeah, something ain't right.
Put a voltmeter across the electrical system in such a way that you can hook it up and let it sit -- alligator clips or similar. Engine off, with a good battery, you should be at 12.6v (assuming you are measuring at the battery or something that is always on). Engine off, accessories on, somewhat lower than 12.6v, but not too much lower. Engine on, maybe 2k rpm, you should be running 13.5-14v or so. If you are seeing the value bump around, that's probably not good, and probably pointing at a voltage regulator, as a problem with the alternator usually will be jittering around so fast, you won't see it on a meter (though may hear a whine in the radio) OR you have a bad connection someplace where the vibration is causing a problem. NEVER rule out bad connections until after a problem is FIXED, you can not easily prove the there isn't a bad connection.