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Mon Sep 22, 2008 10:26 am

OK, first VW 71 Beetle have always been a chevy guy.... I have an old battery, and a so called good generator in the car, when it starts i have a gen light when i rev it up it gets brighter, if the battery is old will it make the light come on? it seems to hold a good charge.... lights stay bright, What is causing the light to come on? could it be crossed the wriing? d+ is comming from the positive side of cable.
thanks for all your help!

Wed Sep 24, 2008 6:54 am

No one has an answer for me?

Wed Sep 24, 2008 7:03 am

check your grounds, make sure they are on good bare metal. sandpaper and a wire brush work wonders. i believe the wire from the VR is blue that goes to the light, check the connection for corrosion and whatnot. might have a bad VR also.

Wed Sep 24, 2008 7:20 am

The blue wire #61 on the regulator is a ground when the generator is not charging. The gen light has + power always and is switched on and off by this blue ground wire. When the gen starts to charge a set of points in the regulator opens and disconnects the blue wire from ground, shutting off the bulb.

So if the bulb stays on, you are not charging or the blue wire is grounded somewhere or the points in the regulator are fused. It happens.

Wed Sep 24, 2008 11:23 am

THanks will double check all wiring, etc. but that would make it get brighter too the light that is when i rev it up?

Wed Sep 24, 2008 11:32 am

you might be getting a ground from somewhere on that blue wire but just barely. well obviousely your getting a ground from somewhere to make the light go on. the fact it get's brighter when you rev, probably has something to do with the charging rate is more with higher RPM.

Wed Sep 24, 2008 2:11 pm

soemtimes stuck points in the regulator will "unstick" if you smack the cover of the regulator- not a fix really, but something that can get you going again

Wed Sep 24, 2008 2:25 pm

Is the light coming on when you turn the key on but before you start the car?