i have a problem with my 72 Super, the alternator is not charging the battery.
thing is it is not the alternator as i have put in another and get the same result, no charge, red light on.
does anyone have any ideas.
can anything else influence the outcome.
i have put a fuel pump relay in that utilises the charging circuit so when the motor stops so does the fuel pump but will only come on as long the accessories is on.
appreciate some good info.

cheers. Paul

Try it without the relay first.

internal regs or not. if not try changing the reg.

will try the relay thing tomorrow,
the voltage reg is in the new alt.
i cant believe that it would be that barls.
well hope not. cheers.
see tomorrow.

it was worth asking as my alternator has a reg under the back seat. just trying to put forward ideas.

Is it the standard charge light in the speedo or an aftermarket one in the dash somewhere?? the reason i ask is that if you are using an led as an charge light they dont draw enough amps??? to turn the light out, you need something with a globe. I have had this problem in both my baja and my drag car.

just a thought.
good luck... i hate alternator problems, i have been plagued with them ever since i bought my first vw...

Mick.

well i checked everything, i had a ground wire hooked up to the fuel joey on the back of the fuel guage (vibrator).
light now goes out but still no charging, as the voltmeter shows just 12 volts, hell knows whats going on...........
Stumped again
anyone anyone

i use the globes supplied as well, no leds at all.

my alternator has the voltage reg inside it. the one from under the seat came out and re-wired as directed by details supplied.
have had this working once before.

Quote:

Originally posted by Super1302 i have a problem with my 72 Super, the alternator is not charging the battery. thing is it is not the alternator as i have put in another and get the same result, no charge, red light on. does anyone have any ideas. can anything else influence the outcome. i have put a fuel pump relay in that utilises the charging circuit so when the motor stops so does the fuel pump but will only come on as long the accessories is on. appreciate some good info. cheers. Paul

Have you tried removing the relay yet ???

Alternator's need a potential (Voltage) difference on the line to cause them to charge... and the amount of difference changes where in the rev range the alternator cuts in. The current direction/polarity also changes between charging and non-charging, which is something a relay probably won't like.

Basically, if you mess with that circuit at all you're likely to cause problems, and like Mick says even just putting in a different Wattage bulb will mess things up.

So yeah - ditch the relay and expect will be all good.

which and what diagram do we follow for the wiring schematics for a 72 super, not an L bug. i have had a look at the usa and other and there is a difference.
anyone.
to me some look like they have an earth to the chasis of the speedometer, what needs an earth and what doesn't,
i cant make heads or tails out of these, i have to make sure i have the correct one before i start taking stuff out.
i know that most things need to be earthed for them to work, hmmm yet again.

Paul

Well i'll be, the green wire that you connect to the blue that you join together under the seat separated.
now up and working

Hi

Is your car fitted with an alternator or generator? I ask because alternators weren't fitted on bugs until 1974.

If your car still has a generator fitted it could be the voltage regulator or a faulty brush in the generator or a faulty generator.

Steve

Up and working Steve, its a 72 Super, use to have a genny but now has alternator.

Paul

yeah Lee, went and looked at my mates that i did for him, how silly for me to forget.
yep placky cased lamps down the bottom.
Easy A



Paul