[C320-list] Alternator Wiring Question

[Jeff Smith]

Mark,

I replaced my Lucas alternator last year. I sent my old one to a shop in Wisconsin but it was beyond saving. It put out the proper voltage and all pedestal instruments were working.

Fast forward to this year and it is intermittent. I think my problem is in the tach wire. As soon as I correct my fuel issue so I can have the engine running so I can troubleshoot, I plan to replace the black connector, because I do not think it is making a good connection.

I have not found a fuse in the wiring. I am fairly sure it grounds to the back of the engine through the engine wiring harness.

I am interested in what you find if you get a solution.

Jeff Smith
‘94, #121, Perkins M30

Sent from my iPhone

> On Jun 28, 2020, at 3:08 PM, <mseyler at cox.net> <mseyler at cox.net> wrote:
> 
> This question is mainly for those who have a C320 with a Perkins M30 engine,
> although I'll take help from anyone.
> 
> 
> 
> I am replacing my OEM Lucas A127 alternator with an 80-amp Lucas alternator
> from Parts4Engines.com. The wiring connections are the same on both
> alternators, but I am not getting any output from the replacement.  One
> possible issue is the ground wire attached to the "B-" connection on the
> alternator.  The wiring diagram in the Perkins Workshop Manual shows a fuse
> in that line somewhere, but I can't find the fuse because the wire
> disappears into a wiring harness bundle.  
> 
> 
> 
> Does anyone know whether the harness really does have a fuse, and if so
> where it is located?  Bonus points if you can also tell me where I would
> find a replacement if the fuse is blown.
> 
> 
> 
> Thanks in advance for any help.
> 
> 
> 
> Mark Seyler
> 
> S/V Reality, 
> 
> Catalina 320, #232
> 
> New Orleans, LA
> 
> 
> 
> 
> 
> 
>