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djjakelee

VW Enthusiast
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Reply with quote  #1 

Hi Folks,

 

Just a quicky my generator light has started coming on after my bugs winter rest. It gets brighter as the engine revs INCREASE! Is this like that it need polorising or just on it's way out, or the regulator, I just don't know, I've never had a g light get brighter with engine revs, always the other way round! It has had a recent battery and it's doing it on and off. Wierd man..

 

Thanks Lee

 

72 bug

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s0cks

VW Wizard
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Reply with quote  #2 
Ok. Look. The more revs, the faster the pulleys move. The more power produced. Sounds like your light is picking it up, which means the switch to cut off the charging is gone. I'd look into it, as this could mean fire in your near future.
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NYer_in_MI

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Reply with quote  #3 

Dude,

The solution starts with making sure the electrical regulator (under the back seat, Left side in most Beetles, but is also often attached to the top of the generator) is in harmony with the generator / alternator.  This is done, as you mentioned, by polarizing the two in harmony.  If you have no idea how to do this yourself, you may like to refer to John Muir's book "How To Keep Your Volkswagen Alive", page '79.

 

The condition to which you are referring I have experienced as well.  It happens when ever the connection between the electrical regulator and the generator are separated in any way.  In my case, the hole that I had in the rear driver's side pan was the reason.  Before I could get the pan repaired, water had gotten up inside, interrupting the connection somehow from the regulator to the generator.   Naturally, the red "Gen" light came on... and stayed on with the ignition switched on.    If the light stays on with the ignition off, that's a whole other matter to deal with, but it's not that big of a deal if it's staying lit with the car running / ignition switch on.

 

Daniel

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djjakelee

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Reply with quote  #4 

Okay, polarized the generator today, went to start it and nothing happenned! Tried jumping, still nothing. Checked power to the started is getting as far as the connector under the seat so now I guess I'll have to look at the starter and solenoid. Damn it! And to think I spent all day yesterday replacing her completely ripped spring broken seats for some lovely scirocco ones. Thats gratitude. Oh well back to the drawing board...

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djjakelee

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Reply with quote  #5 

Sorry to reply to myself but now started. Fault was a bad connection on the starter motor so now I can take her for a spin to see if the polarization has worked!

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NYer_in_MI

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Reply with quote  #6 

Dontchya hate when something stupid and easy like that happens?  Same bit happened to me, once, while driving back to Bay City from Detroit in my (then) '73 1302 Auto.  I stopped by a rest area for the usual pause.  When I went to start my car again... nothing!  I checked everything that I knew, but still nothing!  Called a wrecker and had it towed from just out side of Genesee County on Interstate 75 to Bay City (about sixty, seventy miles).  I couldn't discover the problem myself, to had it towed to my mechanic.  A simple wire had come unclipped from the starter solenoid... bugger wire!  Clip it back on to the solenoid, and I was back in business!  Boy, at what cost!

Daniel


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68autobug

VW Guru
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Reply with quote  #7 

 Good to See  that You found the problem....

that wire can easily fall off the solenoid, as You know, and Now You will remember if there is a next time....

I'm just hoping it isn't raining or snowing the next time it happens...

If the ignition switch was faulty or the wire had fallen off, or broke off??

 

You can start the engine with a screwdriver...

Just short out the two Large connections on the solenoid...

[which is attached to the starter Motor]

Just remember to have the Parking Brake ON....

I hate doing this as You will have some sparks when shorting the two terminals out with the screwdriver.... 

 

Best Wishes from Australia --

 [Resting in Hospital at present & these Internet Cafe computers aren't as friendly as Your Own]

 

Lee Noonan -- 68AutoBug --


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djjakelee

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Reply with quote  #8 
Well I thought it was fixed BUT then I drove it at night and it still does it! The gen light 'sometimes' comes on dimly (not noticable during the day) and gets brighter with engine revs, and also only does it when warmed up. I think I'll try a new fan belt.....
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Marc

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Reply with quote  #9 

The warning light compares the reference voltage (the ignition system voltage from the battery, via the ignition switch) to what's coming out of the regulator. It starts glowing when there's a difference of a couple of volts.

 

Here's the important part: it's only a light bulb, it has no brains - it doesn't care which direction the voltage difference is in. If the reference voltage is low, the normal operation of the generator/alternator could make the light brighter at higher engine speeds because the charging voltage would be higher than the reference voltage

 

Why would the reference voltage be low? Plenty of reasons, but the battery's new so the most likely cause is resistance in a connection or wire somewhere in the current path to the lamp from the battery (and that includes the negative battery cable's connection to the pan as well as both ends of the trans ground strap). On a `72, B+ power first goes to the fusepanel and from there to the ignition switch - and the ignition switch on `71-up bugs also controls power to the headlamps, so when they're on any resistance in the wiring/connections to this point is going to cause a drop in the reference voltage available to the warning lamp.

 

This could be an ignition switch starting to go bad, but odds are it's just a loose/corroded connection at the fusepanel. Check the big red wires.

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68autobug

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Reply with quote  #10 

One thing that can help as Marc suggested and I have done to My Beetle and My Son's Beetle recently.... was to polish all the connections at the fusebox - so they shine like new...  actually all cinnections should be done like that...

I used a Dremel type tool with a small wire brush on it....

Disconnect the battery first.... otherwise there will be sparks...

I even had to polish the fuses had corrosion on them....

Copper gets contaminated over the years and all connections end up bad & badder...

I actually rewired My beetle completly with larger sized wires and relays etc... and the lights are so Bright its scarey.....

The tail lamps look like stop lamps until I apply the brakes... then You need shades on the eyes....

I have H4 Hella semi sealed beam Halogen headlamps too...

 

I hope You find the problem..... its just that these cars weren't actually designed to last 30 plus years....  no car is.... BUT these cars do!!

 

cheers

Lee Noonan

 

http://community.webshots.com/user/vw68autobug

 


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djjakelee

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Reply with quote  #11 

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djjakelee

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Reply with quote  #12 
Sorry for the blank entry! Any all my problems were down to the regulator. The charging is all working now, even the wipers have some speed. Of course my beetle wasn't too pleased with this all running well so thought it would start spewing oil out the  flywheel and then brake one or two piston rings. Picked up a replacement 1500 lump which turned out to be a 1300 with a mashed clutch plate so refused to go in anyway.

Aaaaaargh.

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68autobug

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Reply with quote  #13 

and I thought I was the one getting all the problems....

 

If there is a way for something I'm touching to go badly....

It Will... as soon as I touch it..... and again if it can get away from it....

 

Best Of Luck....

 

Lee Noonan -- 68AutoBug -- Australia --

 

http://community.webshots.com/user/vw68autobug

 

 



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chrissamuels

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Reply with quote  #14 

just wondering, is there anything wrong if the light turns off when the engine starts but when you turn it off, it turns on, the oil light dosent though? Just wondering.

 

Thanks,

Chris

 

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J_Robinson1997

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Reply with quote  #15 
Quote:
Originally Posted by s0cks
Ok. Look. The more revs, the faster the pulleys move. The more power produced. Sounds like your light is picking it up, which means the switch to cut off the charging is gone. I'd look into it, as this could mean fire in your near future.
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