Alternator wiring

[911 envy]

I am replacing alternator and voltage regulator in my 74 911 with a Bosch alternator with built in regulator. I’m fairly certain I know where to hook I the hot red wire and blue wire that goes to the instrument panel. I cut and capped the black voltage regulator wire. I’m not sure what to do with a white or faded tan wire that remains. I took pictures of the original wiring but they’re not helping me. I’d appreciate any help I can get.

Ron from Indiana

[Walter_Middie]

Ron,

Is the white or faded tan wire a ground?

B+ = red wire
D- = brown wires (ground 2 required)
61 = blue wire

[911 envy]

I believe so. When I disassembled things a second broken white wire was laying on top of the block. I didn’t have any brown wires. But I do see two brown wires feeding the regulator.

[911 envy]

I’ll try to attach a picture of my replacement alternator and my regulator. Not sure what to do to take it out of service.

[911 envy]

I’ve spent almost an hour trying attach pictures. I give up.

[timmy2]

Click advanced when you want to reply and scroll down to attach.

[PeteKz]

Ron, see my reply on the other thread you started. Then delete that thread and stick to one thread. Brown (not tan) is ground.

[911 envy]

Thank you. I’m struggling navigating our site. I’ve tried to delete the duplicate but can’t pull it off. Only option I find is to edit it. Also struggling to attach photos. A helpful member says to start with “advanced reply”. I can’t even find that option.

I’ll keep trying

Thanks again.

[timmy2]

Right beside the yellow post quick reply it says go advanced.
You cannot be in mobile view.

[timmy2]

Here you go:
Click right yellow box to get to this screen.
Type something then scroll down and hit the blue button.
Find your photos, click upload, wait for a check mark to appear and select done.
Files must be under 5 mb
You cannot add one at a time or a few if small enough.

First screen:



Second screen:

[al lkosmal]

[911 envy]

Thank you. I finally see the Bulletin 1.