stubble! Posted May 20, 2006 Share Posted May 20, 2006 So when I fire up my r1150rs, the battery light will stay lit until I blip the throttle. Then it goes out and stays out. The battery is new. Think my belt is loose? Link to comment
Boffin Posted May 20, 2006 Share Posted May 20, 2006 So when I fire up my r1150rs, the battery light will stay lit until I blip the throttle. Then it goes out and stays out. The battery is new. Think my belt is loose? TADT, to some degree or other. The voltage regulator electronics need the altenator voltage to go over a threshold before they drop the light. Once over then need a lower voltage to put it on again. this is done to stop the light flickering. As long as the light stays off after you 'blip' the throttle you should be fine. Andy Link to comment
Jim Moore Posted May 20, 2006 Share Posted May 20, 2006 My R1150 GS has been doing the same thing for the last 66,000 miles. I've decided it is not a problem. Link to comment
Haynes Posted May 20, 2006 Share Posted May 20, 2006 ...The voltage regulator electronics need the altenator voltage to go over a threshold ... Andy Exactly as Andy said. You can test this on a cool morning if you start the bike without the fast idle lever and don't raise the revs; the light will stay on. The alternator will not cut in until the regulator registers a voltage that is marginally higher than the battery's (around 13.2 volts). At this point, if you listen carefully, you can hear the whirring sound of the alternator once the revs are increased and the light goes out. Link to comment
stubble! Posted May 20, 2006 Author Share Posted May 20, 2006 Thanks all! Drinks are on me! Link to comment
RFW Posted May 21, 2006 Share Posted May 21, 2006 So when I fire up my r1150rs, the battery light will stay lit until I blip the throttle. Then it goes out and stays out. The battery is new. Think my belt is loose? No. That is the way that Bosch (and many other European) alternators work. The alternator's field is initially energized by the current flowing through the light to the field. It is a "feature" of a these alternators that they have to reach a minimum RPM before they starts self energizing, and the light then goes out. Absolutely normal. Bob. Link to comment
bmuuEd Posted May 21, 2006 Share Posted May 21, 2006 Mine didn't start doing this untill I removed the second battery from my rtp. What's interesting is that that battery was shot, put out 4 volts. Link to comment
Recommended Posts
Archived
This topic is now archived and is closed to further replies.