TheSamba.com :: View topic - Alt? reg? help please! (re-wiring 67 bug)

Mon Aug 25, 2008 3:55 pm

hello all. im a total newb with the ol air coolers but im learning well on this car! haha

Anyways, some sort of electrical short led to a total melt down of my buddys wiring harness in his 67 bug (pic below) so we bought a complete new oem harness an are 99% re-wired.

now the one spot we are confused on is his generator, or alternator i don't know how to tell them apart! haha. the car is suppose to have a voltage regulator in the car, was not there with old setup. which leads me to believe the generator on the car has one internally. but i need to know for sure.

the part number on it is BOSCH AL82ON
and 908 48507

what do we have an how do we wire it up? :lol:

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Mon Aug 25, 2008 7:02 pm

AL 82 is internally regulated alternator.

http://www.nls.net/mp/volks/schem/gen_alt.htm

http://www.nls.net/mp/volks/schem/gen_alt.gif

Tue Aug 26, 2008 8:48 am

exactly what i needed, thanks!!

Tue Aug 26, 2008 6:54 pm

keifernet wrote: AL 82 is internally regulated alternator.

http://www.nls.net/mp/volks/schem/gen_alt.htm

http://www.nls.net/mp/volks/schem/gen_alt.gif

hey im having some trouble identifying the alternator with an internal, an alternator without, and a generator. if you could help me as well. i bought an alternator with an internal regulator. i just would like to know how to identify them. i bought it new. well i just ready the label and its an AL 82 also. so i know its internal. but any physical appearances that could be spotted?

Tue Aug 26, 2008 9:01 pm

ok we got everything wired up an checked out. tryin to fire up bit the coil is not firing. def have power to the coil but it's not putting out any spark. the diagram shows its suppose to have a green wire from the dizzy, but there is a red an a black coming from the dizzy...

does this mean its been converted from points to a electronic setup? if so how do i make it fire!?

thanks!!

Wed Aug 27, 2008 6:50 am

vwralley wrote: ok we got everything wired up an checked out. tryin to fire up bit the coil is not firing. def have power to the coil but it's not putting out any spark. the diagram shows its suppose to have a green wire from the dizzy, but there is a red an a black coming from the dizzy...

does this mean its been converted from points to a electronic setup? if so how do i make it fire!?

thanks!!

YES...

Here you go...

The RED wire from the electronic ignition goes to the POSITIVE side ( +/ "15") which is confusing to some because VW WIRING HARNESS ORIGINALLY has a BLACK WIRE for 12V + to the coil from the ignition switch... this causes people to hook up wires wrong and fry shit quite often.

Then you BLACK wire from the electronic ignition goes to the NEGATIVE side of the coil ( where the green wire on Bosch condensor would go.)

Wed Aug 27, 2008 7:08 am

vicleswootclay wrote: keifernet wrote: AL 82 is internally regulated alternator.

http://www.nls.net/mp/volks/schem/gen_alt.htm

http://www.nls.net/mp/volks/schem/gen_alt.gif

hey im having some trouble identifying the alternator with an internal, an alternator without, and a generator. if you could help me as well. i bought an alternator with an internal regulator. i just would like to know how to identify them. i bought it new. well i just ready the label and its an AL 82 also. so i know its internal. but any physical appearances that could be spotted?

Hopefully this will help in future. There are many threads on Alternator ID scattered about. I am putting pics of all of them in this one post/ thread.

Internal regulated Bosch AL 82 or "chinese made copies" look like this.

BOSCH

CHINESE COPY

Original Factory installed Bosch ( AL 78) and Motorola with 3 prongs and needs external regulator.

Bosch AL- 78

Motorola "AL -78"

Motorola AL -78 compared to "aftermarket" Motorola with white box regulator on top.

Closer look at this one...

Wed Aug 27, 2008 8:29 am

keifernet wrote:

The RED wire from the electronic ignition goes to the POSITIVE side ( +/ "15") which is confusing to some because VW WIRING HARNESS ORIGINALLY has a BLACK WIRE for 12V + to the coil from the ignition switch... this causes people to hook up wires wrong and fry shit quite often.

Then you BLACK wire from the electronic ignition goes to the NEGATIVE side of the coil ( where the green wire on Bosch condensor would go.)

perfect, thanks for clearing that up. that is exactly what we did. so when you say "fry stuff" what exactly does that fry? verified once again the wiring was correct per some info i found (red to 15 blk to 1) an also double checked again that the coil was getting power. all checks out but still no spark...

any tips to diag the pertronix(or whatever version it is)? i popped the cap off an looked in the dizzy, but couldn't really see past the black plastic (not the one that just sits on top, removed that with the rotor) an it appeared to be ok, but didnt really look much further

Thu Aug 28, 2008 6:03 am

vwralley wrote: keifernet wrote:

The RED wire from the electronic ignition goes to the POSITIVE side ( +/ "15") which is confusing to some because VW WIRING HARNESS ORIGINALLY has a BLACK WIRE for 12V + to the coil from the ignition switch... this causes people to hook up wires wrong and fry shit quite often.

Then you BLACK wire from the electronic ignition goes to the NEGATIVE side of the coil ( where the green wire on Bosch condensor would go.)

perfect, thanks for clearing that up. that is exactly what we did. so when you say "fry stuff" what exactly does that fry? verified once again the wiring was correct per some info i found (red to 15 blk to 1) an also double checked again that the coil was getting power. all checks out but still no spark...

any tips to diag the pertronix(or whatever version it is)? i popped the cap off an looked in the dizzy, but couldn't really see past the black plastic (not the one that just sits on top, removed that with the rotor) an it appeared to be ok, but didnt really look much further

There are many reports of "failure" of these electronic modules these days. Quality control seems to be an issue with some brands ( maybe all brands? :shock: ) Also in your case you cannot be sure if the unit you have has been hooked up backwards to the coil or what...

If it were me, for now, I would install points and condenser or another distributor set up with points and see if you get spark and get the engine running.