Try this again. I have a 1974 beetle with a alternator/with external regulator. I am replacing the engine that has a generator installed. How do I use the existing wiring for the generator?

10

Asked by May 05, 2013 at 10:34 AM about the 1974 Volkswagen Beetle

Question type: Maintenance & Repair

The 1974 alternator has a 3 prong clip that has a DF, D+, and D- terminal which is connected to the external voltage regulator. The B+ is run to the battery. There is another wire on the B+ side, where it goes I am not sure.The generator appears to be wired similarly. I have another parts bug that used a generator that I can remove the voltage regulator from. Any way to wire this up?

10 Answers

under the backseat, there is a voltage regulator. why aren't we using this one?...oh yeah, are you are trying to use a one-wire replacement? The B+ and ground connection are the only ones we should be concerned with, the other wires should be ignored, if NOT using an external regulator- will have to make a/look at a drawing of the old system to make a schematic so we both can understand what to do with these extra wires-

3 of 3 people found this helpful.

DF= field coils D+ generator plus voltage D- =ground---a one wire lays waste to these---snip 'em...got it.

4 of 4 people found this helpful.

yes...the blue wire, okay connect your new alternator one wire output to the secondary of the voltage regulator, this should make the blue light come on under under-voltage conditions~....whew, got that one figured out...it kinda bugged me too...this simplicity is not without complications such as indication for non-functioning conditions...

10

This is the set up. So I use the B+(red/white) wire from the alternator connect to the D+ post on the generator. Then I use the DF(green) wire from the alternator to the DF post on the generator. The D-(brown) wire on the alternator becomes the ground on the generator. It will be best to replace the external Motorola regulator with the one for a generator.

wow...okay have not dealt with those...good work!~

1 of 1 people found this helpful.
10

Seems like it would work. Just changing wire locations and the voltage regulator to one that is common to the generator. I think the wiring form the regulator out should stay the same. I'll let you how it turns out. Any other opinions?

1 of 1 people found this helpful.

well DF=field coils (we definately don't need that) D+ sane as B+ You've got a "lineman's splice" into the B+, not quite sure how this will know that it has reduced fewer than 12.5 volts....think the ole voltage regulator had a reduced voltage blue light enabler...would make sense~ the field coils are not used with solid state, this voltage causes the pulses from the olde tyme coils, much like the old fashioned voltage regulators that GM would use a bank of three, ford two...back in the day...

190

I used a 71 Ford voltage regulator with my VW alternator. Way more dependable. Try this diagram.

16 of 16 people found this helpful.
190

I used a 71 Ford voltage regulator with my VW alternator. Way more dependable. Try this diagram.

3 of 3 people found this helpful.

This answer is late for this post, but.....why not just install the alternator and stand onto the replacement motor? It is a much more reliable system than the generator.

Your Answer

Add photo

Related Questions

Beetle

Looking for a Used Beetle in your area?

CarGurus has 9,557 nationwide Beetle listings starting at $1,500.

ZIP:

Search Volkswagen Beetle Questions

Volkswagen Beetle Experts

#1 tenspeed
tenspeed
Reputation 1,640
#2 Chris Billings
Chris Billings
Reputation 1,480
#3 Tom Demyan
Tom Demyan
Reputation 1,220
View All

Related Models For Sale

Used Honda Civic
657 Great Deals out of 88,604 listings starting at $995
Used Ford Mustang
470 Great Deals out of 45,735 listings starting at $1,999
Used Volkswagen Golf
61 Great Deals out of 2,881 listings starting at $1,995
Used Toyota Corolla
785 Great Deals out of 73,830 listings starting at $1,995
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Volkswagen Passat
263 Great Deals out of 24,442 listings starting at $1,000
Used FIAT 500
66 Great Deals out of 5,661 listings starting at $3,900
Used BMW 3 Series
972 Great Deals out of 31,729 listings starting at $1,000

Used Cars For Sale

2017 Volkswagen Beetle For Sale
3,810 listings starting at $16,135
2016 Volkswagen Beetle For Sale
15 Great Deals out of 480 listings starting at $11,999
2015 Volkswagen Beetle For Sale
38 Great Deals out of 952 listings starting at $9,500
2014 Volkswagen Beetle For Sale
17 Great Deals out of 709 listings starting at $7,995
2013 Volkswagen Beetle For Sale
26 Great Deals out of 731 listings starting at $7,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.