alt. wiring help

[Brant]

I'll be able to post pictures tomorrow or the next day..
but in the mean time, can anyone tell me about the seperate wires coming from the alternator on a 1967 S motor.

specifically where each one is supposed to go and the colors.

Its a conversion race car in case your wondering, and I ditched the factory wiring looms.

I don't have a 911 manual or any wiring sheets.

a couple of the wires make since, but a few do not.
for example, the ones that go to the regulator have an extra pig-tail coming back out of the terminal.

I'll get a picture up tomorrow, or if anyone has the manual showing each of the alternator wires that would really help a ton.

thanks in advance everyone!!!!

brant

[mb911]

what year engine?

[jpnovak]

All early alts should be the same.

Large Red goes to B+
Brown goes to ground
Blue goes to D+ (alt. light)
Black goes to D(field) for regulator.

[Brant]

Jamie,

thanks...
what about the other wires coming out of the alternator. Not the regulator wires, but the other heavy wires.

one looks to go to the starter, but there are a few extras.

I'll post the picture later today
motor/alternator are 1967S

tia
brant

[jpnovak]

Typically the red wire goes to the starter and also the rear fuse panel. There may be several grounds that tie together.

A picture would help. I am not as familiar with the early wiring on a 67.

edit.

Here is a wiring diagram.



YOu need to look at #2. The red wire goes to the control box(V regulator) adn then changes to blue (D+). A red/White wire goes to a relay and then to a starter (black). The black goes directly to the regulator (Df)

[Brant]

finally got a picture:


1) the regulator plug makes sense, except for the green wire that comes out of it. Is it the alt. warning lite?

2) The red and white large wire goes to the starter then? (why is the circle connector so small?)

3) the right angled connector wire that looks black in my picture.
where does it go?

4) the large circle connector wire. give me a minute to go check what color it is. (accidently cropped the picture too close)
can anyone verify where it goes?

brant

[Brant]

Ok... #4 is brown.. so ground.

using the above wire-chart. I'm feeling more comfortable about everything except for #3.

anybody care to tell me where that black pigtail from the red/white goes?

brant

[Brant]

bump please.
tia

[Brant]

Last bump I promise.
I'll take the question to another forum later today...

but can anyone tell me about that pigtail off of the heavy starter wire?

I know there is a similar looking wire that runs to the solenoid from the starter switch... but why would a hot wire from the alternator go there?????

[jpnovak]

I don't know if another forum would be able to help. Maybe the early911S registry.

I am confused in the wiring diagram by an unlabled part between #3(VR) , #8 the resistor, and #51 (resistor relay) There is clearly a red/white and black connection there. I can only assume this is the starter solenoid based on the electronic schematic.

Looking closer at the picture it looks like the black wire may not be black but just an outer coating. The ring terminal where it joins the red/white wire shows a bit of color that looks like faded red. I can only assume that this is actually a red/white wire of smaller diameter and that it goes to the starter solenoid or resistor relay.

Sorry, I am just not familiar with that early wiring.

[mb911]

pretty sure jamie is right

[304065]

OK, unless you are planning on winning the pebble beach concours, you can ignore that factory wire harness. You want the connector, though.

There are only four wires to be concerned with.

B+ battery positive- this is from the alternator's output terminal. This should be a fat red wire that runs from the alternator B+ to the starter terminal.

D+ /61- thin blue wire from this terminal on back of alternator, over to the voltage regulator, then forward to the warning lamp.

D- this is a brown wire, ground. Also, you should have a thick copper cable that runs from the alternator case to the engine case.

DF, or Dynamo Field. This is a thin black wire that comes out of the voltage regualtor and goes to a 1/4" faston tab on the alternator's brush holder.

That's it. That's what makes it go. Anything else is either superfluous, e.g. power distribution to the engine compartment for other stuff, or wrong.

So how do we fit your stuff into that schematic?

Let's start with the voltage regulator plug. Not bad: you've got an original. The blue wire with the faston male connects to the warning lamp circuit. (You can even see the schematic representation of the faston connection in the old diagram- the little distortion in the blue wire) The red runs over to the D+/61 terminal on the alternator. In later years, the whole wire was BLUE, a lot less confusing. Now, the brown wire, that's the ground for the VR, that runs to D-. The black wire, that's your DF, that runs to the DF terminal on the brush holder.

Now, this red/ white, this runs to the B+ terminal on the back of the alternator. The small black wire looks like it originally ran to the mystery resistor, whatever that is. If you don't have one of those, cut it off! Other end goes on the big starter post.

Be CAREFUL! You could easily start a fire if you hook this stuff up backward. Good luck!

[Brant]

Thanks everyone...
and thanks John.

makes me feel a bit more confident with my plans.

thanks pelican!!!!!

brant

[mxracer21cba]

Thanks Guys for the help. The red and white wire from the alternator the large one connects where? to the one side of the brown resistor block i take it. And the black wire from the mark 10 capacitive discharge i think is the power in connects where? last question a pale yellow wire with the end cut off runs along the oil lhose line to the front of the car any idea what this is for?

thanks