Hi G=guys, I'm looking for some technical help for my run around. Its a nexus 500 that has just started to blow headlight bulbs as soon as the revs rice above 1200 rpm. At tickover they are fine and work, as soon as revs rise they will blow and engine management light comes on. Alternator produces no more that 15v at revs and 13.7 on tickover so I'm ruling out voltage regulator as dash lights and other lights dont dim and brighten as the revs rise/fall. Engine management light goes out on tickover and comes back above tickover. Side lights are fine, work constantly. I'm guessing the earth for the dipped/main beam could be the problem, does anyone know the location of the earth for the lights? Or indeed have any other ideas as to the problem. regards and thanks in advance Smudge
I would say that it is an exposed wire that is not quite touching that needs a high revving engine to provide a strong enough current to jump causing the short and blowing of the bulb. The fact that the engine management light comes on too, probably indicates some wiring issue there. But what about the stator .I believe that different parts of it send current to different areas of the bike /scoot. There are three cables that exit the stator that must have the same reading. Disclaimer : I am in no way an auto electrician, just applying logic, and things I have seen along the way. Sent from my Samsung Note 3 with Tapatalk
Thanks for the response. I've found the main connector from the stator. Three thick wires, I'll test each one but they should only show what current is coming from the stator. About 13.7 at tick over and maxing at 15v with revs. It's got to go through the voltage regulator to bring it down to 12 for the bulbs so I need to test it leaving the regulator. Ran out of time today but I'll carry on tomorrow. I'm thinking the regulator may have one than one output and the one for the lights is buggered.
