Author Topic: Wiring Help  (Read 7017 times)

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Offline dirtydeedss

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« on: June 10, 2007, 09:13:10 PM »
im ready to wire my buggy and have a few questions about the charging system and alternator.
first off heres what I have. and is this an external reg. alternator?

if it is, this is the right regulator?

i have found this diagram how to wire the alternator, http://www.cbperformance.com/pdf/Alternato...WiringGuide.pdf
the wire off the B+ terminal on the alternator goes to the starter, does it go to the same terminal on the starter as the battery cable goes to?
and does anybody know of a wiring diagram how to wire the regulator?

This here i dont plan on using, it is on the shelf and was wondering what it is?
(it is wired onto the alternator)


Offline James Buchan

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« Reply #1 on: June 10, 2007, 09:21:37 PM »
Yes that is an external reg'd alt... if you have some extra cash I would highly recommend an internal reg'd one, much cleaner and easier to wire.

Otherwise check out vintagebus.com (or something like that) for wiring diagrams

Offline dirtydeedss

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« Reply #2 on: June 10, 2007, 09:29:04 PM »
Thanks for the link, im going to use the alternator i have just because i already have it, i checked out the wiring diagrams on vintage bus, but i dont know what year beetle diagram to follow, because i dont know what year the alternator set up i have would be from. any ideas?

Offline slammedbus

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« Reply #3 on: June 10, 2007, 09:49:28 PM »
shouldn't really matter for the year as long as you have one with external reg and 12v. VW didn't really change wire colours much.
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Offline Mowser

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« Reply #4 on: June 11, 2007, 11:13:12 PM »
I can't make it out but have you tried simply googling the model number on that Motorola piece?  You'd be surprised what you come up with especially when you have a specific number.  
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Offline silas

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« Reply #5 on: June 11, 2007, 11:55:08 PM »
can we see a close up pic of the terminals on the buggy motor alt & the bosch reg?

i'm thinking this is close to the diagram you want to follow...

« Last Edit: June 12, 2007, 12:06:09 AM by silas »

Offline silas

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« Reply #6 on: June 12, 2007, 12:15:49 AM »
also, does that black plug & harness on the shelf motor plug directly into the motorola reg? does the black plug also plug directly on the buggy motor alt?

if so, try taking that black plug & harness and plug it into the buggy alt, then plug the harness into the motorola reg.....then run a thick 10 or 12 gauge wire from b+ on the battery to b+ on the alt.....then wire that leftover blue wire on the motorola reg to the red light on the back of the speedo.

if that lets the smoke out....run. B)  

Offline dirtydeedss

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« Reply #7 on: June 12, 2007, 08:05:55 AM »
i hooked thjat motorola piece up to the reg and then ran the battery wire and it didnt charge.  Im thinking maybe that that motorola regulator might not work or either the alternator doesnt work, because i am fairly sure that i have hooked up the motorola right. ( i also did have that alternator taken apart at one time, so maybe i put it together wrong?)  I followed this wiring diagram. http://www.nls.net/mp/volks/schem/altreg.gif  After i get home from school ill take more pics of the other regulator.

Offline egspot

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« Reply #8 on: June 12, 2007, 08:11:04 AM »
From the lounge:

I am not a guru but I seen to remember some things.


I will see if I can find the picture of my engine with the outside \"Motorola piece
« Last Edit: June 12, 2007, 08:12:09 AM by egspot »

Offline Hansk

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« Reply #9 on: June 12, 2007, 08:26:14 AM »
I was going to say the same thing.  That pic with the harness pluged into an alt.  and the motorola reg.  with its plug , should just plug together.   If the other end of that harness from the alt is missing(cant see it in the pic) I think the wire colors should be the same as on the reg , just match them up and put them togeter.  And yes , the big + terminal on the alt can be run to the big + terminal on the starter ( same as from the battery)
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Offline Hansk

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« Reply #10 on: June 12, 2007, 08:30:11 AM »
Oh and I'm pretty sure the blue wire from reg needs to be hooked up to the dash light (and the light needs to actually work )  or it will not charge.
« Last Edit: June 12, 2007, 08:30:41 AM by Hansk »
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Offline amishrabbi

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« Reply #11 on: June 12, 2007, 08:56:28 AM »
if you havent tested the alt i would just to be sure, cause otherwise you may have it hooked up right and not know it
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Offline dirtydeedss

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« Reply #12 on: June 12, 2007, 10:11:12 AM »
Quote
Oh and I'm pretty sure the blue wire from reg needs to be hooked up to the dash light (and the light needs to actually work )  or it will not charge.
ill try that.

Offline silas

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« Reply #13 on: June 12, 2007, 11:49:41 AM »
Quote
....the blue wire from reg needs to be hooked up to the dash light (and the light needs to actually work )  or it will not charge.
right.

very important piece of the puzzle. make sure you check that light.

Offline silas

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« Reply #14 on: June 12, 2007, 12:34:36 PM »
here is a great read and description of the charging system and how the circuit works. there is also a descrition on how you can rig it to work with minimal wiring closer to the end.

http://www.thesamba.com/vw/forum/viewtopic...ternator+wiring

Offline dirtydeedss

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« Reply #15 on: June 12, 2007, 06:05:34 PM »
anyone know how to test a motorola voltage reg. to see if it working?

Offline silas

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« Reply #16 on: June 13, 2007, 07:05:57 PM »
Quote
anyone know how to test a motorola voltage reg. to see if it working?
not sure.

wire it up and then test for voltage readings at the alt & the reg.

Offline dirtydeedss

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« Reply #17 on: June 17, 2007, 10:23:49 PM »
I went and took the generator and voltage regulator out of my beetle to get my buggy ready for the wcsd.  After the showdown ill go back to monkying around with the alternator.
so heres my regulator for the generator.
so as i read the diagram off vintage bus i wanted to double check I dont fry anything befor i hook it all up.
#1goes to the battery?
#2 is the dummylight?
#3Goes to Df on the generator?
#4goes to D+ on the gen?

Offline dirtydeedss

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« Reply #18 on: June 18, 2007, 04:06:43 PM »
on the pic above i posted, terminal #1 has two spots for connectors. one goes to the battery and do I need the other one?
if so where does it go?

Offline BUSDADDY

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« Reply #19 on: June 18, 2007, 05:03:14 PM »
Looks right, look at the mounting tabs really close, there is usually d+, etc. stamped in there.

The bonus terminal isn't used unless you are adding acessories and need a battery terminal.
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Offline dirtydeedss

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« Reply #20 on: June 18, 2007, 07:30:02 PM »
cool thanks i goter all going now

Offline silas

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« Reply #21 on: June 18, 2007, 09:00:17 PM »
Quote
cool thanks i goter all going now
good show.

does it work?

Offline dirtydeedss

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« Reply #22 on: June 18, 2007, 10:08:54 PM »
yes it works. but the dummylight is all fubared up.
« Last Edit: June 18, 2007, 10:09:24 PM by dirtydeedss »

Offline silas

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« Reply #23 on: June 18, 2007, 11:38:29 PM »
Quote
yes it works. but the dummylight is all fubared up.
how so?

is the system charging?

Offline dirtydeedss

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« Reply #24 on: June 19, 2007, 07:44:11 AM »
when i turn the key on it will not come on but when I get the engine running it will come on. the more rpm the brighter the light seems to get. but I checked the charging and its putting out about 14.5 volts.

Offline BUSDADDY

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« Reply #25 on: June 19, 2007, 12:52:31 PM »
You have +voltage from the key going to the other side of the light bulb , right?
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Offline dirtydeedss

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« Reply #26 on: June 19, 2007, 03:37:18 PM »
:huh:  im confused

Offline BUSDADDY

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« Reply #27 on: June 19, 2007, 05:39:56 PM »
The dash light is not grounded, it's supplied with 12V+ (or 6V+ if you are running 6V) from the same wire as the oil light (black insulated area on the back of the speedo fed by a black wire from the ign. switch). The charge light is then lit by more voltage trying to go back to the generator.

+power from the generator against +power from the ign. switch = no light.

+power from the switch and a -draw from the generator = light.
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Offline dirtydeedss

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« Reply #28 on: June 20, 2007, 12:04:53 AM »
hmm i just hooked it straight up to the light tab on the regulator, but its no big deal as i didnt plan on using it anyway. iv got a volmeter guage. thanks for the help.